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July 24, 2014

Search: If each atom has a radius of 1.43 , what is the length of a side of the unit cell?

Number of results: 9,309

chemistry
The radius of an atom is about 10,000 times as large as its nucleus. If the atom were enlarged such that the radius of its nucleus was 1 inch, what would be the radius of the atom in meters? I need the formula to follow so that I can solve this problem.
December 1, 2011 by george

Chemistry
Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 (femtometers) and the radius of the atom is approximately 70 (picometers). The volume of the nucleus is 8.2×10^−8 pm^3 And the volume of the atom is 1.4×10^6 pm^3 I found the ...
August 31, 2011 by Brittany

physics
In Bohr's model of the hydrogen atom, the radius of an orbit a. is proportional to n2. b. is smallest for the highest energy state. c. increases when a photon of light is emitted from an excited atom. d. can have any value that is larger than the ground-state radius. e. none ...
August 15, 2009 by jeff

Physics
Can someone help me with this, i have started it but cant get it to work out. The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest, or “ground” state, n=3 is ...
November 10, 2007 by Aaron

Chemistry
A helium atom has a smaller atomic radius than the hydrogen atom. Explain why.
November 21, 2013 by tstephens

physics
An ionized helium atom has a mass of 6.6*10^-27kg and a speed of 4.4*10^5 m/s. The atom moves perpendicular to a 0.75-T magnetic field on a circular path of radius 0.012m. Determine whether the charge of the ionized helium atom is +e or +2e. Can anyone please give me some ...
April 1, 2008 by Kelly

physics
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.0 10-15 m. The single electron in a hydrogen atom normally orbits the nucleus at a distance of 5.3 10-11 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete ...
December 1, 2006 by MIke

Chemistry
Which has a larger radius, the oxygen atom (O) or oxygen ion (O-2) ? Explain. Isn't the ion bigger because negative ions are bigger than atom's radius. im not sure though.
October 23, 2010 by Sheryl

Physics
A doubly charged helium atom (mass = 6.68 x 10-27 kg) is accelerated through a potential difference of 3.00x 103 V. What will be the radius of curvature of the path of the atom if it is in a uniform 0.410 T magnetic field?
December 1, 2008 by Brynlie

chemistry
Assume that the entire mass of an atom is concentrated in its nucleus, a sphere of a radius 1.5 x 10 to the -5 pm. If the mass of the atom is 2.39 x 10 to the -22 g, what is the density?
September 29, 2008 by andrew

Chemistry
Why, in terms of atomic structure, is the radius of an Na atom larger than the radius of an Na+ ion?
November 20, 2010 by danny123

Science
Atom building game board has 17 protons, 18 neutrons, and 18 electrons. *What is the atom that's represented on the game board. *What is the total charge on this atom? *What is the mass # of this atom? *What do you call an atom that different #'s of protons and neutrons? *What...
September 21, 2007 by Sonic

Why does the He atom have a smaller radius than th
(a) Why does the He atom have a smaller radius than the H atom? (b) Why is the He atom smaller than the Ne atom?
August 17, 2010 by gabyj

Science
Hello van some one show me how to draw a dot and cross diagramm for 1 lithium atom and 1 fluorine atom(Lif) and also a diagram for 1 magnesium atom and 1 oxygen atom (MgO) Thankyou Paul.
March 28, 2011 by Paul

AP chem
Second question: In the LiCl structure shown in 9.18 [LiCl's lattice, where the "Cl- ions are in contact with each other, forming a face centered cubic lattice."], the chloride ions form a face-centered cubic unit cell 0.513 nm on an edge. The ionic radius of Cl- is 0.181 nm. ...
December 7, 2006 by chris

Science
What is the radius in nm of the electron orbit of a hydrogen atom for n=3? What is the radius in nm of the electron orbit of a hydrogen atom for n=4?
January 14, 2014 by Katie

Chemistry
An estimation of the radius of a lead atom: a. You are given a cube of lead that is 1.000 em on each side. The density of lead is 11.35 g/cm3. How many atoms of lead are contained in the sample. b. Atoms are spherical; therefore, the lead atoms in this sample cannot fill all ...
November 13, 2011 by Arnol

Chemistry
Which atom has the smallest valence p atomic orbital? -Carbon -Nitrogen -Sulfur Why? A. That atom has the highest electronegativity. B. That atom has the fewest number of electrons. C. That atom does not have electrons in p orbitals. D. The valence electrons for that atom have...
April 19, 2012 by Pooya

chemistry
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.) Radius (in centimeters):
April 2, 2013 by adex

chemistry
the model of the atom that pictured the atom with electrons struck randomly throughtout the mass of the atom was called the
October 27, 2010 by 000

physics
A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 55.2° angle from its original direction and the unknown atom travels away at a 51.8° angle. What is the mass of the unknown atom? [Hint: ...
October 20, 2011 by kago

Physics
Is the trend for ionic radius just that for metals, they are smaller than the nuetral atom and for non-metals, and for non-metals, they are bigger than the neutral atom? Or is there another specific trend?
February 26, 2011 by Emily

Physics
Is the trend for ionic radius just that for metals, they are smaller than the nuetral atom and for non-metals, and for non-metals, they are bigger than the neutral atom? Or is there another specific trend?
February 26, 2011 by Emily-Help Please!

Chemistry
which atom has the least attraction for the electrons in a bond between that atom and an atom of hydrogen? (1) carbon (2)nitrogen (3)oxygen (4) fluorine
December 1, 2010 by Anonymous

chem
1. under what circumstances is the molecular geometry around a single central atom the same as the electron group geometry around the central atom? 2.If all of the electron groups around a single central atom are bonding, and the same outer atom is bonded to the central atom ...
April 28, 2008 by natash

Chemistry
For each of the following, enter the number of covalent bonds that the atom can form: (A) One atom of carbon (B) One atom of sulfur (C) One atom of nitrogen with no net charge (D) One atom of nitrogen with positive net charge (E) One atom of oxygen with no net charge (F) One ...
March 7, 2013 by qwerty

Physics
Could someone help me with these questions. . . please 1. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf 2. The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. ...
November 12, 2007 by Mike

Physics
The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n^2, where n=1 labels the lowest or "ground" state, n=3 is the thrid state, and so on. If the atom's diameter is 1 x 10^(-10)m in its ...
November 16, 2009 by Lauren

physics
The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest, or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is 1x10-10m in its lowest ...
November 6, 2007 by Will

Physics
The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is 1x10-10m in its lowest ...
July 1, 2010 by Richard

chemisty problem help
Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 70 pm. Calculate the volume of the nucleus and the volume of the atom. What percentage of the carbon atom's volume is occupied by the nucleus? Can someone tell me how to do this? Volume= 4/...
February 8, 2007 by Tagen

science
Which statement best compares an atom to an ion? A.An ion is an atom that has lost its charge. B.An ion is an atom that has gained or lost protons. C.An ion is an atom that has gained or lost electrons. D.An ion is an atom that has a different number of neutrons.
January 24, 2014 by victoria

Science
Suppose a large atom bonds with a small atom. Predict whether the properties of the new molecule will be the same as the large atom, the same as the small atom, or different from both atoms.
November 19, 2008 by Amber

physics
The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n = 1 labels the lowest, or "ground" state, n = 2 is the second state, n = 3 is the third state, and so on. If the atom's ...
August 4, 2011 by stacy

chemistry
Molar Volume of Sodium If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Question Estimate the volume, V , of a sodium atom ( Na ) using its metallic radius of 186
November 9, 2008 by unkname

Zoology
Can you rank these from the smallest to the largest? Heart carbon atom sodium atom electron nucleotide tundra mitochondria glucose molecule fungal cell hydrogen atom
August 29, 2010 by Marcus

chemistry
a metal crystallizes in the face centered cubic crystal structure with a unit cell edge of 5.48 x10 power of -8 cm. the density of the metal is 6.90 g per cubic cm. a. what is the mass (g) of a single atom of this element. b. what is the atomic weight of the element (g per mol...
December 4, 2011 by amanda

physics
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.0 10-15 m. The single electron in a hydrogen atom normally orbits the nucleus at a distance of 5.3 10-11 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete ...
December 1, 2006 by MIke

Chemistry
Which atom has a larger atomic radius, Ca or Ra? Why?
November 15, 2010 by Jazmin

physics
A hydrogen nucleus has a radius of 1 x 10-15 m and the electron is about 5.3 x 10-11 m from the nucleus. Assume the hydrogen atom is a ball with a radius of about 5.3 x 10-11 m and the nucleus is a ball with a radius of 1 x 10-15 m. How much work (in electron volts) must be ...
April 24, 2008 by shanika

Chemistryy
Identify the observations of Ernest Rutherford's experiment with the gold foil. Where he experimented on alpha particles and deflection. Check all that apply.... 1) a positive charge is spread equally over the atom 2) THE MAJORity of the space inside the atom is empty space. 3...
August 29, 2011 by Dalton

chemistry
SOMEONE CAN PLZ EXPLAIN IN DETAIL HOW TO SOLVE THIS PROBLEM..THNKS Molar Volume of Sodium If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Question Estimate the volume, V , of a sodium atom ( Na ) using...
November 9, 2008 by unkname

chemistry
Which atom in each of the following pairs has a larger radius? a) Na or K b) V or Zn c) V or Ta d) Li or Ba
November 11, 2012 by lynn

chemistry
a metal crystallizes in the face centred cubic cubic crustal structure with a unit cell edge of 5.48 x10 power of -8 cm.the density of the metal is 6.90g per cubic cm. a. what is the mass in grams, of a single atom of this element. b. what is the atomic weight of the element (...
December 4, 2011 by amanda

Physics
A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron (d) the kinetic energy (e) the potential energy, and (f) the total energy...
April 28, 2012 by Chi

science
The radius of the Iron atom is 124 pm. How many of these will span a distance of 50.5 m..
September 5, 2011 by megan

chemistry
1) what flaws exsit in Dalton's model of the atom? 2) what flaws exist in Thompson's plum pudding model of the atom? 3) what flaws exist in Rutherford's model of the atom? 4) what flaws in Bohr's model of the atom? 5) do any flaws exist in the modern quantum model of the atom...
November 14, 2007 by Anonymous

engineering
Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is the volume of each atom...
February 19, 2012 by ali

chemistry
Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is the volume of each atom...
February 19, 2012 by ali

chemistry
1 The size of cation is ...... and the anion is ........ than atom. 2 The removal of an electron from an atom results in the formation of a ....... the size of which is ........ than that of the atom.
May 3, 2012 by pooja

general chemistry
the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density
February 6, 2013 by melissa

chemistry
Which atom or ion would you expect to have the smallest radius? Ne F- Na+ Ne-
February 25, 2013 by adex

Science
Which atom or ion would you expect to have the smallest radius? Ne F- Na+ Ne-
March 2, 2013 by Akhil

chemistry
1.which of the following is the most polar bond? explain n-f c-f h-f o-f 2. in the trigonal bipyramidal geometry, which position - axial or equatorial - do nonbonding electrons prefer? why? 3.under what circumstances is the molecular geometry around a single central atom the ...
April 23, 2010 by katherine

chemistry help
Determine the number of moles of each specified atom or ion in the given samples of the following compunds.( Hint: the formula tells you how many atoms or ions are in each molecule of formula unit.) a. O atom in 3.161x10^21 molecules of CO2 b. C atom in 3.161x10^21 molecules ...
March 8, 2009 by jaz

PHYSICS
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force exerted on each particle, ...
September 22, 2013 by suhani

Physics
In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... >> Increase by a factor of 2??
April 4, 2010 by Kat

Physics
The allowed orbits for the electron around the nucleus of the hydrogen atom are explained by de Broglie as ... a. Quantized values for the total energy of the electron in the atom b. Quantized values for the angular momentum of the electron in the atom c. Standing waves for ...
April 4, 2010 by Sandra

Chemistry
Ok an atom loses an electron becomes positive-atom gainin electron becomes negative? Is that correct? thats w/ 1 electron in outer shell of one atom and the other atom receiving an electron to fill its outer shell
January 18, 2011 by Brenda

Physics
A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The acceleration of gravity is −9.8 m/s2. As ...
April 2, 2013 by Crow

chemistry
Estimate the volume of one sodium atom using its metallic radius of 186pm please help
November 10, 2008 by dre

chemistry
Molybdenum (Mo) has a density of 10.22 g/cm3 and it crystalizes into a fcc unit cell, calculate the radius of a (Mo) atom?
June 7, 2011 by Lilly

CHEMISTRY
PLEASE HELP I REALLY DO NOT UNDERSTAND THIS YOU DONT REALLY HAVE TO ANSWER THE QUESTIONS BUT AT LEAST JSUT A LITTLE HINT THATS ALL PLEASE AND I HAVE A QUIZ ON THIS TOMORROW MY TEACHER REALLY CANNOT TEACH 1) what flaws exsit in Dalton's model of the atom? 2) what flaws exist in...
November 14, 2007 by Anonymous

Science-Periodic Table
whats the connection/relationship between the # of protons in the nucleus of an atom & and atomic # of the element? The atomic number tells you the number of protons in the nucleus of the atom. The atomic number is the number of protons in the nucleus of an atom. The number of...
April 8, 2010 by Sara

chemistry
Gallium crystallizes in a primitive cubic unit cell. The length of an edge of this cube is 362 pm. What is the radius of a gallium atom? The face-centered gold crystal has an edge length of 407 pm. Based on the unit cell, calculate the density of gold. Type of atom Fraction in...
November 24, 2008 by ea

chemistry
1state relative mass and charge of an electron 2 an atom of an element X may be written as 4X^9 (a)What does the figure 9 indicate? (b)what is the number of protons in an atom X? (c)what is the number of electrons in an atoms X? (d)what does the number 4 indicate? 3 describe ...
May 4, 2012 by pooja

science
When was the idea of the atom first introduced? wasnt it around 450 B.C.. Some claim Demotricus introduced it, as the "atomos", but I am not certain on reading his works he understood it as the thing we know as the atom. The best dating we can do is that Leucippus in 420 BC ...
March 31, 2007 by pop

physics
The radius of a merry-go-round is 7 meters, and it takes 12 seconds to make a complete revolution. What is the speed of an atom on the outer rim?
October 3, 2012 by Brittney

science
A uranium and iron atom reside a distance R = 28.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. Calculate the distance r from the uranium atom necessary for an electron to reside in equilibrium. Ignore the insignificant gravitational ...
February 19, 2013 by Kels

science
A uranium and iron atom reside a distance R = 28.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. Calculate the distance r from the uranium atom necessary for an electron to reside in equilibrium. Ignore the insignificant gravitational ...
February 19, 2013 by Kels

chemistry
1. name the three fundamental particles present in an atom? mention the masses of the particles in M.K.S. system? 2.what is a proton? stste its relative mass and charge? 3.how many times a proton is heavier than an electron? 4.what important information are furnished about the...
May 4, 2012 by pooja

chemistry
I need help on a few of these. A. How many protons are in one atom of fluorine - 19? B. How many neutrons are in one atom of potassium - 39? C. How many electrons are in one neutral atom of V - 51? D. What is the symbol for the element that has 78 protons? E. What is the ...
April 14, 2011 by mary

physics
In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... a)Decrease by a factor of 2 b)Remain the same c)Increase by a factor of 2 d)Actually, it is not possible for the radius of the orbit to double e)Increase or decrease by a ...
April 4, 2010 by jude

Chemistry
what is the volume of the unit cell? A metal crystallizes in a face-centered cubic lattice. The radius of the atom is 0.197 nm. The density of the element is 1.54 g/cm^3
February 6, 2008 by Lauren

Physics HELP!!!
In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.0529·10−9m when it is in the n=1 state. What is its electric potential energy?
November 1, 2010 by Ryan

physics
In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.052910−9m when it is in the n=1 state. What is its electric potential energy?
November 5, 2010 by Maree

college chemistry
Rubidium metal, Rb, crystallizes in a body-centered cubic arrangement. What is the radius of one atom of Rb, if its density is 1.5320 g/cm3?
February 21, 2014 by hershi

physics
The electron in a hydrogen atom with an energy of -0.544 eV is in a subshell with 18 states. What is the principal quantum number, n, for this atom? What is the maximum possible orbital angular momentum this atom can have? Is the number of states in the subshell with the next ...
April 12, 2012 by jazz

Physics
Charged particles such as ions can separate the charges inside of overall electrically neutral atoms, thus making an electric dipole. A dipole is characterized with a dipole moment p=αEexternal, where α is the polarizability of an atom, and Eexternal is the external ...
July 1, 2013 by Mary

Physics
A triply ionized beryllium atom (Be3+) has only one electron in orbit about the nucleus. What is the radius of the ion when it is in the n = 9 excited state?
April 6, 2012 by DCM

Chem
Paper thickness varies. Typically, 100 sheets are about a cm thick. Atoms typically vary from 1 to 3 angstroms in radius. (An angstrom is 10-10 m.) Suppose a piece of paper is 0.0073 cm thick. How many atoms span the thickness if the radius of the atom is 1.94 angstroms?
September 12, 2012 by k

Chemistry-atoms
A. How many protons are in one atom of fluorine - 19? B. How many neutrons are in one atom of potassium - 39? C. How many electrons are in one neutral atom of V - 51? D. What is the symbol for the element that has 78 protons? E. What is the symbol for the neutral atom that has...
April 14, 2011 by Anne

chemistry
Is the calculation of percentage of each atom within a Body centered cubic cell AKA volume of the BCC cell same as the atomic packing factor for the BCC unit cell. The BCC % is 68%. the atomic packing factor is just 0.68. Am I completely wrong? And also how do i calculate the ...
January 13, 2010 by Anonymous

Physics
In the hydrogen atom the radius of orbit B is sixteen times greater than the radius of orbit A. The total energy of the electron in orbit A is -0.378 eV. What is the total energy of the electron in orbit B?
April 5, 2012 by DCM

Chemistry
Atom A- 6 protons, 6 electrons, 7 neutrons Atom D- 6 protons, 6 electrons, 8 neutrons Atom X- 7 protons, 7 electrons, 8 neutrons Atom Z- 8 protons, 8 electrons, 9 neutrons Which two atoms are isotopes of the same element? a. A and D b. A and Z c. X and D d. X and Z How am I ...
October 16, 2010 by timmy123

chemistry
Assume that the aluminum atoms can be represented as spheres, as shown in the drawing (Part C figure) . If each Al atom has a radius of 1.43 angstroms, what is the length of a side of the unit cell?
October 20, 2009 by allie

chemistry
Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom?
January 29, 2010 by Fred

PHYSICS
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force exerted on each particle, ...
September 13, 2013 by smita

physics
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force exerted on each particle, ...
September 16, 2013 by suhani

PHYSICS
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force exerted on each particle, ...
September 17, 2013 by suhani

chemistry
Strontium has density of 2.64 and crystallizes with the face-centered cubic unit cell. Find the radius of the strontium atom
July 10, 2011 by hannah

Chemistry
Copper has density of 8.94 and crystallizes with the face-centered cubic unit cell. Calculate the radius of a copper atom.
January 29, 2012 by amy

college physics
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force exerted on each particle, ...
September 18, 2013 by suhani

college physics
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force exerted on each particle, ...
September 21, 2013 by vishal

physics
Thanks for the answer. I ask If one proton and one neutron are added to the nucleus of a nitrogen atom, which atom will the new nucleus look like? And you gave me the answer: The new atom would be oxygen, isotope 16. Could you please explain to me how.
March 3, 2012 by Anonymous

chemistry
what does an atom of lead look like? what are the parts that compose of the atom? help me pls
September 3, 2007 by chemistry

Physical Science
If an atom were to lose a neutron the atom's ________ would be affected.
May 3, 2011 by Dewight Johnson

chemistry
ratio of lone pair on surrounding atom to central atom in Xeo2F2?
May 5, 2011 by Mukund

chemistry
consider a neutral atom with 30 protons and 34 neutrons. What is the mass number for the atom?
June 20, 2011 by mema

chemistry
consider a neutral atom with 30 protons and 34 neutrons. What is the mass number for the atom?
June 21, 2011 by mema

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