What limitations might an atomic model have in properly illustrating the structure of an atom? An atomic model cannot be used to represent the relative number of each subatomic particle within a specific atom. An atomic model helps with calculations

13,078 results
  1. Science

    An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?(1 point) 39 58 19 20 I need help

  2. Science

    The Composition of Atoms Quick Check questions and answers Science 8 A Unit 3: Matter Interactions A. A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy level? 1. four in the

  3. science

    Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?

  4. Chemistry

    What is the nuclear charge of an atom with a mass of 23 and an atomic number of 11? (1) 11+ (2) 12+ (3) 23+ (4) 34+ How do you figure this out? Would the answer be (1) 11+ since the atomic number is 11 and atomic #=protons which are positive??

  5. Science

    Atomic Structure Unit Test Question Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) The model should show 59 protons and 27 neutrons. The

  6. Chemistry

    Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find

  7. science,

    1. How many periods are there in the periodic table? * 1 point 6 7 8 9 2. How many groups are there in the periodic table? * 1 point 15 16 17 18 3. State the number of valence electrons in an atom of Sulfur. * 1 point 2 4 6 8 4. State the number of valence

  8. Science--HELP!!

    Can you please check my answers: 1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of _________ (electrons?) 2. The description of the structure of the atom is called ______ (atomic model?) 3. In a water

  9. Science

    1. How is a model of an atom different from a real atom? A. A model of an atom is not as big as an actual atom. B. A model of an atom is the same as a real atom. C. A model of an atom is more complex than a real atom. D. A model of an atom is not as small

  10. science

    HELP ME !!!!!!! What is the atomic number of an atom?(1 point) the number of particles in the nucleus the number of protons the number of neutrons the number of particles outside the nucleus Which statement about an atom is correct?(1 point) The proton has

  11. science

    Given the following nuclear reaction 251 0 A ----- Cf ----> --- Y + --- X 98 0 Z 1. What is the atomic mass of the new atom?: 2. What is the atomic number of the new atom?: 3. What is the atomic symbol of the new atom?: 4. What type of decay is

  12. chemistry

    I wanted to check my True and False Chemistry HW. I am not 100% they are correct. 1.the number of neutrons in an atom is reffered to as its atomic number False 2.the periodic table is arranged by increasing atomic number True 3.atomic number is equal to

  13. Chemistry

    Give the formal charge on the sulfur atom in a Lewis structure for the sulfate ion in which every atom satisfies the octet rule. Based off my lewis structure, I think the formal charge of the the sulfur atom would be +2. Is that correct?

  14. Science!

    Ernest Rutherford's atomic model included a nucleus comprised of positive particles called protons. Later, James Chadwick discovered neutrons. How did Chadwick's discovery change the atomic model? A. The new model showed a negatively charged nucleus. B.

  15. Chemistry

    which atomic model best explains the helium atom? A. Bohr's Model B. Dalton's Model c. Quantum mechanical model D. Thompson Model Not really sure what this question is asking.

  16. Physics

    The model of the atom has changed as scientists have gathered new evidence. Four models of the atom are shown below, but one important model is missing. I don't understand.... ) :

  17. Chemistry

    one neutron is added to the nucleus of an atom of Carbon-12. how has the atom been changed? It has a greater atomic mass?

  18. Chemistry

    A helium atom has a smaller atomic radius than the hydrogen atom. Explain why.

  19. Science

    What is the atomic number of an atom?(1 point) A. the number of particles outside the nucleus B. the number of particles in the nucleus C. the number of neutrons D. the number of protons Which statement about an atom is correct?(1 point) A. The neutron has

  20. phsyical science

    compare an atoms structure to a ladder. what parts of the ladder correspond to the energy levels of the atom/ identify one way a real ladder is not a good model for an atom.

  21. Chemistry

    Why, in terms of atomic structure, is the radius of an Na atom larger than the radius of an Na+ ion?

  22. Chemistry

    Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find

  23. chemistry

    A hypothetical metal has a simple cubic crystal structure. If its atomic weight is 70.6 g/mole and the atomic radius is 0.128 nm, compute its density.

  24. physical science

    compare the postions of the electrons in Bohr's model of the atom with their positions according to modern atomic theory

  25. chem

    Determine the electron and molecular geometries of each of the following molecules. For those with more than one central atom, indicate the geometry about each central atom. (Enter your answers in the order given in the skeletal structure from left to

  26. Chemistry

    Write a brief passage describing a neutral atom of nitrogen-14 (N-14). Describe the number of protons, neutrons, and electrons in the atom, where each type of particle is located, and how the terms atomic number, mass number, and atomic mass are related to

  27. chemistry

    C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. H-C-C-C-C- O-H ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this

  28. Science

    Cobalt has a mass of 59 and a atomic number of 27A student wants to create a model of a cobalt atom which statement about the model is correct

  29. Chemistry

    What limitations might an atomic model have in properly illustrating the structure of an atom? An atomic model cannot be used to represent the relative number of each subatomic particle within a specific atom. An atomic model helps with calculations to

  30. Chemistry

    Calculate the radius of a palladium (Pd) atom, given that Pd has an FCC crystal structure, a density of 12.0 g/cm3 , and an atomic weight of 106.4 g/mol.

  31. Atoms ASAP

    An atom of potassium has an atomic mass of 39 amu and an atomic number of 19. It therefore has ______ neutrons in its nucleus. a. 19 b. 39 c. 20 d. 2

  32. Science

    18. The description of the structure of the atom is called the ___. ATOMIC MODEL 19. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A ______ bond is found in a water molecule. COVALENT BOND 20. Sodium chloride is formed

  33. CHEMISTRY (PLEASE HELP)

    1.What would happen to poisonous chlorine gas if protons were added neutrons were added 2. Boron is 80.20% boron -11 (atomic mass = 11.01 amu) and 19.80% of some isotope form of boron. What must the stomic mass of this second isotope be in order to account

  34. chemistry

    Atom X has atomic mass (A) = 40 and atomic number (Z) = 20. Atom Y has A = 42 and Z = 20. How are these two atoms related?

  35. chemistry

    1.what is meant by atomic number of an element? 2.the mass number of an element is 18,it contains 7 electrons.what is the number of protons and neutrons in it?what is the atomic number of the element? 3.an element has an atomic number of 11 and its mass

  36. science help

    What would happen to the current model of the atom if new information about its structure is discovered in the future? A. The current atomic model would be revised. B. The current atomic model would be strengthened. C. The current atomic model would be

  37. science

    1.the modern atomic model includes orbiting the nucleus. which of the following parts of dalton's was disproved by the discovery of the electron atoms are tiny particles atoms cannot be divided into smaller parts atoms have specific mass and size atoms

  38. PLEASE HELP

    13. The picture is a model of a nitrogen atom. What is incorrect about the atomic orbital arrangement of electrons in this model?

  39. science Help 911!!

    If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current? A. atomic theory B. atomic model C. atomic number D. carbon cycle Is the answer A?

  40. Science 1 easy question!!!!

    One way the modern atomic model differs from Thomsons atomic model is that electrons are no longer scattered throughout an atoms positive matter like chocolate chips in cookie dough, instead each electron is outside of the nucleus occupying a specific

  41. chem

    one atom of silicon can properly be combined in a compound with A. one atom of chlorine B. two atoms of oxygen C. three atoms of hydrogen D. four atoms of calcium B. two atoms of oxygen (as in SiO2.. quartz and sand) Ther is also a compound SiO. It is used

  42. science

    An atom of sodium-23 (atomic number = 11) has a positive charge of +1. Given this information, how many electrons does it have? How many protons and neutrons does this atom have?

  43. science Help

    How did the discovery of the electron change the atomic model? A.it disaproved the earlier idea of an indivisible atom. B.it confirm that atom are very tiny. C. It exposed fraudulent experiments conducted by unqualified scientists. D. It proved that atom

  44. science

    Rutherford used his gold foil experiment as evidence for a new atomic model. He suggested that the atom contained a small positively charged nulceus surrounded by a large void filled with only a few electrons orbiting the nucleus. What other experiment or

  45. chemistry

    1)nitrogen atom has atomic no 7 and mass no 14.hydrogen atom has atomic no 1 and mass no 1.what is no of protons and neutrons of ammonium ions

  46. science

    I'm doing Science right now. I have the answers down for most of them but I'm not sure if I am right..... Can u pls help me and tell me if my answers r right? I suck at science :S 1.A 2.C 3.B 4.D 5.D 6.A 7.? 8.A 9.E 10.C 11.A 12.D 13.C 14.B 15.? 16.? 17.?

  47. Science - Chemistry

    1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the ____. 2. The description of the structure of the atom is called the ___. 3. In a water molecule, two atoms of hydrogen and one atom of oxygen share

  48. Chemistry

    The standard atom for the atomic masses of all the elements is the atom of carbon which has 6 protons and 6 neutrons (12C) and is assigned the atomic mass of exactly 12. Under this standard, the atomic mass of iron, atomic number 26, is 55.845 u and the

  49. science

    one way the modern atomic model differs from the bohr model of an atom

  50. science Help 911!!

    One way the modern atomic model differs from Thompson's atomic model is that electrons are no longer scattered throughout an atoms positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a

  51. 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

  52. 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

  53. science

    the current atomic model would be revised if 1)better microscopes were being used to study its structure. 2)better microscopes are invented in the future. 3)new information about an atoms structure is discovered.*** 4) a new element is discovered in the

  54. Science

    Consider an atom whose designation is given as 94 Pu 242. How many Protons are found in this atom? http://www.chemicalelements.com/elements/pu.html Protons same in all isotopes. The number of nutrons varies to change to atomic weight there are 94 because

  55. chemistry

    the model of the atom that pictured the atom with electrons struck randomly throughtout the mass of the atom was called the

  56. student questinnaire

    what are your limitations? how do you compensate for them? this is something i have never thought about before and i just don't know what my limitations are!!! i need to fill out a school form. it sounds weird but can someone please help me figuring out

  57. Atomic Model/Science

    A particular neutral uranium atom has 92 protons,143 neutrons, and an atomic mass of 235. How many electrons does the atom have?

  58. Science

    This is for lesson 9 unit 2 science test: The current atomic model would be revised if A:better microscopes were being used to study its structure or B: better microscopes are invented in the future C:new Information about and atom’s structure is

  59. 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

  60. chemistry

    Use the shell model to explain why a lithium atom Li, is larger than a beryllium atom, Be. I don't think it is larger. It has a lower atomic number 3 vs 4. It is therefore lighter see below link and click on elements. http://www.webelements.com/

  61. science 20-1

    An atom has an atomic mass of 32.06 and an atomic number of 16. a. Determine the identity of the atom. b. Determine the number of neutrons in the most common form of the atom. c. Determine the number of valence electrons this atom has.

  62. Science

    The current atomic model would be revised if... A.)Better microscopes were being used to study its structure. B.)Better microscopes are invented in the future. C.)New information about an atoms structure is discovered.

  63. 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

  64. Chemistry

    How is it possible that the atomic number increases in order, yet the atomic masses do not? A. There is no relationship between the atomic number and mass of the atom. B. The masses of the protons for Te, I, and Xe have slightly different masses. C. Since

  65. chemistry

    how to fit four bonds on one atom? modeling the atoms that make the atomic bonds what would be the 3D model?

  66. 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

  67. a&p

    In modern blimps, the gas of choice is used to inflate them is helium is safer. Compare and contrast the atomic structure of hydrogen and helium. What characteristics of the atomic structure of helium make it so much less reactive than hydrogen?

  68. Chemistry

    I have a problem that I'm wondering is a "trick" question. How many nucleons are there in an atom of 235 (atomic mass) over 92 (atomic #) U? According to the periodic table, the atomic mass is 238, not 235. Any comments? Thanks a lot!

  69. Science

    The modern atomic model includes electrons orbiting the nuclear us which of the following parts of daltons atomic model was disapproved by the discovery of the electron? Adams are tiny particles atoms cannot be divided into smaller parts atoms have

  70. Thank you Ann (kinematics)

    Thank you Ann! I had the equations and really was closing in on the answer... (stopping for 23 s is what really got me confused) in either case, the displacement for a) is 888 m ! Now I'll try to calculate (b). Thank you much! P.S. This is in response to

  71. physical science

    compare the positions of the electrons in bohr's model of the atom with their positions according to modern atomic theory. state the importance of valece electrons in the organization of the periodic table

  72. Science/math

    BCC crystal structure, atomic radius of .1363, and an atomic weight of 95.94g/mol. How would you compute the theoretical density?

  73. Science

    Use the following words to fill in the blanks. Atomic number Ionic bond Atomic mass Law of conservation of mass Endothermic reaction Electron Covalent bond Product Isotope Proton Carbon cycle Energy level, orbital, or shell Atomic model Atomic theory 1.

  74. Science

    Daltons idea that atoms cannot be divided into smaller parts was was disproved by the discovery of______? The description of the structure of the atom is called the________? In a water molecule, two atoms of hydrogen and one atom of oxygen shared

  75. Science Chemical Reactions

    1. The current atomic model would be revised if (1 point) A• better microscopes were being used to study its structure. B• better microscopes are invented in the future. C• new information about an atom’s structure is discovered. C• a new element

  76. Science

    The current atomic model would be revised if A. better microscopes were being used to study its structure. B. better microscopes are invented in the future. C. new information about an atom’s structure is discovered. D. a new element is discovered in the

  77. Chemistry

    Write a brief discussion of the relationship between the atomic spectrum (number and position of the lines) and the electronic structure (shell model) of the gases. I know that the bigger the atom, less energy and so does that have something to do with

  78. CHEMISTRY

    PLEASE HELP I REALLY DO NOT UNDERSTAND THIS YOU DON'T 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?

  79. Science

    1. How does nanotechnology how engineers make products for the future? A. By changing a materials atomic structure, it can be made from elements that are easier to obtain. B. By changing a materials atomic structure, it's physical properties can also be

  80. science

    When an atom is broken down into parts, what happens to its identity? The atom is no longer recognizable. The atom takes on a new average atomic mass. The atom becomes a new type of matter. The atom becomes a new element. Is it the third one?

  81. Chemistry

    The Bohr model stops representing correct atomic structure when? Why? What does this mean for remaining atoms? How does Bohr's model relates to the periodic table?

  82. physics

    Which of the following is correct according to Rutherford's atom model? Choose one answer. a. Atomic spectra should be line spectra. b. Electrons do not radiate while revolving in an orbit. c. Atomic spectra should be continuous spectra. d. Electrons are

  83. science

    cobalt has a mass number of 59 and an atomic number of 27. a student wants to create a model or a cobalt atom. which statement about the model is correct?

  84. physical science

    6. Draw a model of the atom shown in the atomic box below. Be sure to place all the protons, and neutrons in the correct location.

  85. 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

  86. physics

    1.Distinguish between atomic physics and nuclear physics? 2.Briefly describe the Bohr model of the atom. What is Bohr’s key idea (involving matter waves) that makes the Bohr atom have discrete energy levels? I really didn't understand what they were

  87. science

    One way the modern atomic model differs from Thomson’s atomic model is that electrons are no longer scattered throughout an atom’s positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a

  88. Science question

    What would happen to the current model of the atom if new information about it’s structure is discovered in the future? Would it be revised, strengthened,proven or defended?

  89. Science Please Check

    Please Check 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical

  90. Science

    Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical

  91. Chemistry

    Right. So, I've been putting this question off from my review... I just attacked it with google to no avail. My books have been no help. Which is FALSE? a. If JJ Thomson's model for the atom were correct, alpha particles would be only slightly deflected

  92. physical science

    The exact question how are the following terms related - subatomic particels and atomic mass unit. The heading on the page is review and reinforcement structure of an atom - the three main subtomic particles are the proton, the nuetron and the electron.

  93. MATH 156

    What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model

  94. College Physics

    the electron in a hydrogen atom can, according to the Bohr atomic model, be regarded as moving at constant speed in a circular orbit of radius 0.053nm. Calculate the tangential speed of this electron

  95. physics

    Which of the following was explained by the Bohr atom? 1. atomic spectra 2. the fact that most of the mass of an atom is in the nucleus 3. nuclear fission 4. the photoelectric effect

  96. math

    What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model

  97. science

    Some hypothetical metal has the simple cubic crystal structure. If its atomic weight is 70.4 g/mol and the atomic radius is 0.126 nm, compute its density in g/cc.

  98. Science

    What would happen to the current model of the atom if new info about its structure is discovered in the future

  99. ph

    Describe the structure of an atom, the quantised shell model and how it produces absorption and emission spectra.

  100. Physics

    Describe the structure of an atom, the quantised shell model and how it produces absorption and emission spectra.

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