1. Chem.

    Which defines what element the atom is? a. protons b. neutrons or d. electrons. I think it might be neutrons, but can you verify this?

    asked by Mora on June 9, 2009
  2. chemistry

    How many outer-shell d electrons are there in each of the following transition-metal ions? Re(III) Sc(III) Ru(IV) Hg(II)

    asked by Katie on March 30, 2012
  3. Chemistry

    Excited state electrons lose energy when they move to the ground state.

    asked by Sarah on December 6, 2014
  4. Chemistry

    In the reaction 2Mg + SnCl4 −> 2MgCl2 + Sn , how many electrons are involved in the conversion of SnCl4 to Sn? 1. three 2. one 3. four 4. two

    asked by Elva on October 16, 2010
  5. Science

    how does a cloud that is charged with electrons form? What is the charge (positive or negative) of such cloud?

    asked by Farah on March 29, 2010
  6. Physics

    An iron ion contains 26 protons, 27 neutrons, and 23 electrons. What is the net charge of the ion?

    asked by David on December 4, 2011
  7. HISTORY PLEASE HELP!!!!!!!!!!

    *** = my answer choice. 1. Which of the following best describes the Klu Klux Klan during Reconstruction? A. a gun club for former Confederate Soldiers. B. a secret political terrorist organization. C. a social group whose members masqueraded in sheets and

    asked by Alisha on March 3, 2016
  8. physics

    A ferry is crossing a river. The ferry is headed due north with a speed of 1.1 m/s relative to the water and the river’s velocity is 4.2 m/s to the east.Find the direction in which the ferry is moving (measured from due east, with coun- terclockwise

    asked by dylan on October 23, 2012
  9. Algebra

    A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 564 km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. Use an equation to find how long the second jet will take to

    asked by Brianna on October 13, 2011
  10. Algebra

    A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 564 km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. Use an equation to find how long the second jet will take to

    asked by Joy on October 14, 2011
  11. physics

    The weight of an astronaut plus his space suit on the Moon is only 270 N. A. How much do they weigh on Earth, in Newtons, assuming the acceleration due to gravity on the moon is 1.67m/s^2= 1584is this right? B. What is the mass of the astronaut and his

    asked by David on October 9, 2014
  12. History

    34. Designed as an attempt to secure the loyalty of the French to their new rulers, this act broke new ground in toleration and statesmanship. Unfortunately for the British, the Americans saw only sinister designs. This act was the a. Treaty of Paris, 1783

    asked by Hannah on October 22, 2010
  13. Physics

    At high noon (sun rays fall perpendicular to the surface of the earth), the sun delivers 990 W to each square meter of a blacktop road, emissivity of 1 (blackbody). If the hot asphalt loses energy only by radiation, what is its equilibrium temperature? I

    asked by Anonymous on June 10, 2016
  14. Chemistry

    About twenty radioisotopes with ultra-long half-lives, from 82 million years (244- Plutonium) to 6 million billion years (50-Vanadium) are found in the earth’s crust, yet no radioisotopes with half-lives less than 70 million years (146- Samarium) are

    asked by Allie on November 16, 2009
  15. Physics

    A light plane is flying at 25 degrees east of due magnetic north, while ascending at 15 degrees above the horizon; the plane is flying at 40 m/s. Find the planes celocity true to the delta x, delta y, and delta z?

    asked by Collin on September 17, 2014
  16. Physics 12 Review

    End of the semester, working on the final review... I have a couple of questions I am stuck on right now. My notes on these questions seem to have vanished into the void... 1. "A 2.0kg puck travelling due east at 2.5m/s collides with a 1.0kg puck

    asked by solexgirl12 on January 23, 2009
  17. Chemistry

    For the balanced redox reaction 2 Al(s) + 3 Br2(g) → Al2Br6(s), determine the number of electrons transferred in the overall reaction.

    asked by Sarah on April 14, 2014
  18. chem

    In the trigonal bipyramidal geometry, which position- axial or equatorial- do nonbonding electrons prefer? why? I know its equatorial but I'm not exactly sure why

    asked by natash on April 27, 2008
  19. Physics

    A 2.0 mm diameter copper ball is charged to +42 nC. What fraction of its electrons have been removed? The density of copper is 8,920 kg/m3

    asked by Caitlin on October 1, 2013
  20. Chemistry

    when a calcium atom loses its valence electrons, the ion formed has an electron configuration that is the same as an atom of (1) Cl (2) Ar (3) K (4) Sc i think its 2 am i right ?

    asked by Anonymous on December 1, 2010
  21. Physical Science

    true or false in an atom, negatively charged electrons surround a positively charged nucleus

    asked by Dallas on May 9, 2011
  22. 9th grade

    would you expect the following atom to gain or lose electrons when forming ions? what ion is the most likey? The atom is In how would i do this?

    asked by helppp on December 4, 2008
  23. Physics

    A metal sphere has a net negative charge of 11 x 10^-6 coulomb. Approximately how many more electrons than protons are on the sphere?

    asked by Dom on March 20, 2011
  24. Chemistry

    Zn(s)+Cu2+(aq)-->Zn2+(aq)+Cu(s) which particles must be transferred from one reactant to the other reactant ? 1.ions 2.neutrons 3.protons 4.electrons 4?

    asked by Alexis on March 20, 2011
  25. Chemistry

    What is the name of the structure and the formal charges? All unshared valence electrons are shown. :O:: | H3C-N-CH3 | CH3

    asked by Anonymous on November 12, 2012
  26. physics

    during 4.0 min a 5.0 a current is set up in a wire,how many coulombs and the electrons pass through any cross section across the wire?

    asked by stephen on October 14, 2010
  27. CHEMISTRY

    We have : Cl | 1) :B-Cl with two unshared electrons | Cl F | 2) :N-F | F then , if we assume that N and B bind covalently , which of them is acid ? And is that also bronshted- lowry acid ? explain thanks

    asked by MAD on July 14, 2014
  28. Physics

    At what distance from a carbon nucleus is the electric potential 2.1 V? Carbon atoms have 6 electrons in the atomic shell.

    asked by Susie on February 24, 2010
  29. Physics

    You have a neutral balloon. What is its charge after 12000 electrons have been removed from it? The elemental charge is 1.6 × 10−19 C. Answer in units of µC.

    asked by Ayo on January 27, 2016
  30. Chemistry

    Al(s) + MnO2(s) → Al2O3(s) + Mn(s) When this reaction is balanced, how many electrons are transferred in each half-reaction? The answer I got is 3*2=6. Is this correct?

    asked by Summer on April 5, 2018
  31. chemistry

    What is the maximum number of hybrid orbitals a carbon atom can form? Is it 4 because carbon has 4 valence electrons? yes.

    asked by Carter on December 16, 2006
  32. science

    I am a metal. I am a transition metal. I have the smallest atomic radius in my group. I have 6 valence electrons. What element am I?

    asked by Mat on September 22, 2009
  33. Physics

    You have a neutral balloon. What is its charge after 12000 electrons have been removed from it? The elemental charge is 1.6 × 10−19 C. Answer in units of μC

    asked by Phil on February 6, 2018
  34. Physics

    A current of 1.03 A flows in a wire. How many electrons are flowing past any point in the wire per second? The charge on one electron is 1.60 10-19 C

    asked by Jasmine on February 11, 2011
  35. Physics

    A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

    asked by Jared on April 2, 2017
  36. 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?

    asked by sidney on October 21, 2015
  37. Physics

    A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

    asked by Jared on April 3, 2017
  38. physics

    Calculate the net charge on a substance consisting of a combination of 6.0 1013 protons and 2.0 1013 electrons.

    asked by carla on February 5, 2010
  39. Chemistry - Science (Dr. Bob222)

    Consider reaction below: 50H3O^+(aq) + 7Cr2O7^2-(aq) +3I_2(aq) --> 6IO_4^-(aq) + 14Cr^3+(aq) + 75H2O (l) How many electrons are transferred in this reaction?

    asked by Adrik on April 14, 2014
  40. physics

    how far apatr should two electrons be if the electric force each exerts on the other is equal to the weight of an electron ? ( take the mass of an electron to be Me = 9.11 x 10-31 kg ).

    asked by hashi on November 26, 2010
  41. Physics

    What visible wavelengths will eject electrons from a a metal with a work function of 2.6 eV? Please show all work I am a little confused :)

    asked by DCM on April 6, 2012
  42. Chemisry

    What is the nuclear charge of S^2- ion? (mass number=32). Also calculate the number of electrons, protons, and neutrons in it.

    asked by Taylor Beach on February 24, 2014
  43. physics

    At what distance from a carbon nucleus is the electric potential 3.8 V? Carbon atoms have 6 electrons in the atomic shell.

    asked by saw on April 26, 2010
  44. chemistry

    how many unpaired electrons are in this complex? Ni(en)2(CN)2 where en is the neutral ethylenediamine and CN is cyanide as the counter ion, I want to say there are no unpaired e- but I'd like a check

    asked by Anonymous on May 9, 2016
  45. physical

    What is the electrons velocity that made its momentum equal to the momentum of photon whose wave length 5200A?

    asked by dany on December 28, 2011
  46. Micoud secondary

    determine the number of electrons required to deposit 6.4g of copper from an aqueous solution of copper II sulphate

    asked by kaye on March 17, 2010
  47. algebra 1

    Rod left his house driving south. Marsha left three hours later, driving 42 km/h faster in an effort to catch up to him. After two hours, Marsha finally caught up. Find Rod's rate.

    asked by kaylie on September 11, 2014
  48. bearings

    PQRS are four locations on the same horizontal plane Q is an bearing of 041 degree from P and the distance is 40km,S is 28km from R on a bearing 074 degree, R is directly due north of P and the distant between Q and R is 38km. Find to the nearest whole

    asked by Anonymous on January 13, 2017
  49. algebra

    You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on

    asked by frank on March 1, 2008
  50. trig

    A boat is 23 mi due west of lighthouse A. Lighthouse B is 14 mi due north of lighthousenA. Find the bearing of lighthouse B from the boat and the distance from lighthousenB tho the boat.

    asked by Pcwest on September 24, 2012
  51. trig

    A boat is 23 mi due west of lighthouse A. Lighthouse B is 14 mi due north of lighthousenA. Find the bearing of lighthouse B from the boat and the distance from lighthousenB tho the boat.

    asked by Pcwest on September 24, 2012
  52. American History

    Can someone check these answers for me and also help with the five that I missed?? | ___T__ 1. Lincoln narrowly defeated Douglas in 1860 as a result of his success in the presidential debates. T/F | ____D_ 2. All of the following were issues in the War of

    asked by DEE on May 14, 2009
  53. science

    What is F1= 125N North

    asked by nike jeric ocampo on November 18, 2013
  54. Physical Science

    30 m/s North is a measure of what

    asked by Anonymous on February 16, 2009
  55. science

    An astronaut who weighed 170 pounds on Earth found that his weight on Jupiter was 400 pounds. He captured an alien that weighed 120 pounds on Jupiter. What is the alien's weight on Earth? A. 34 pounds B. 51 pounds C. 78 pounds D. 283 pounds

    asked by Spartans on February 12, 2015
  56. World Geo, Help pls

    Please help!!! Which of the following is not true about Aborigine culture? (1 point) It is the oldest surviving culture on Earth. Traditional Aborigine societies formed agricultural settlements. Aborigines do not believe that land belongs to humans.

    asked by mia on April 27, 2015
  57. Math

    We are learning to read charts and graphs this week in Math. I was asked this question: Compare the population per square mile in Asia to the population per square mile in North America for the year 2000. The population in Asia in 2000 was 4,028,000,000

    asked by Carrie on May 30, 2008
  58. Physics

    On the earth, you throw an object up in the air at some velocity, v, and it reaches a maximum vertical displacement (max. height if you prefer) of 4.8 meters. If you went to the moon, where the value of the gravitational acceleration of the moon is 1/6 of

    asked by Micheal G. on September 16, 2011
  59. Physics

    A man moves due north 6km then he moves 4km due west and then moves 4km southwards finally he moves 4km eastwards.Find his: total distance and displacement

    asked by Nonso on November 15, 2015
  60. physics

    i will begreatfull if u help me insolving the below problems: 1.)the time period of a pendulum clock on the surface of the earth is 6 sec.Find the timeperiod of the same pendulum on the moon.(g=9.8m/sec2) 2.)the time period of a pendulum is 6.28sec.Whay

    asked by srikar on May 17, 2012
  61. physics mc question!!!!HELP

    Question # 1 : It a particle increases its speed by a factor of 2, what happens to the kinetic energy? a)doubles b)cuts in half c)increases by a factor of 4 d)depends on whether or not work is done on the particle Question # 2: An object falling near the

    asked by lilly on May 22, 2012
  62. English

    This question is based on the following poem: Seasons are celebrations. A year's a Ferris wheel. Both honor our world's habit of spinning 'round a star. 7. Which one of the following sentences best expresses the main idea of this poem? A. The world has a

    asked by Nikita on May 4, 2013
  63. Physics

    A plane is heading south with a velocity of 150 kilometers/hour. It experiences a tailwind with a velocity of 20 kilometers/hour. Find the resultant velocity of the plane

    asked by Hannah on December 17, 2012
  64. physics

    A plane is heading south with a velocity of 150 kilometers/hour. It experiences a tailwind with a velocity of 20 kilometers/hour. Find the resultant velocity of the plane

    asked by kiandra on April 19, 2013
  65. english

    Identify the sentence that is correctly punctuated. a. We stopped at several places during our drive up the East Coast: Savannah, Georgia, Charleston, South Carolina, Trenton, New Jersey, and Allentown, Pennsylvania. b. We stopped at several places during

    asked by steve on October 13, 2017
  66. Chemistry

    Are binary compounds ionic or covalent? If they are covalent, I thought they don't form bonds that way, since they share electrons.

    asked by Emily on March 15, 2011
  67. Physics

    How many electrons must be removed from an object to leave it with a charge of 2.0 x 10 exp-10C? This is a small though not neglible static charge.

    asked by Nina on May 10, 2010
  68. AP Chemistry

    The principal quantum number of the electrons that are lost when tungsten forms a cation is ? Tungsten is a transition metal.

    asked by koolchem on January 13, 2013
  69. Science

    In an atom, electrons ____. are located in the nucleus are paired with neutrons are located in the electron cloud are always in the same place

    asked by Raelyn on March 7, 2013
  70. Physics

    Problem 22.2 2*10^ 13 electrons flow through a transistor in 1.0 ms. Part A - What is the current through the transistor? Express your answer using two significant figures. in mA

    asked by Paige on September 25, 2011
  71. Science

    In a stable atom, the number of protons equals the number of___________ A. Nuclei B. Electrons C. Neutrons D. Isotopes

    asked by Anonymous on January 5, 2019
  72. Physics check

    If an atom has 104 electrons, 157 neutrons, and 104 protons, what is the atomic number of the nucleus? have no idea

    asked by Bev on April 17, 2008
  73. Physics

    Problem 22.2 2*10^ 13 electrons flow through a transistor in 1.0 ms. Part A - What is the current through the transistor? Express your answer using two significant figures. in mA

    asked by Paige on September 25, 2011
  74. Chemistry

    Consider the last electron in B: Values for n,l,and ml of 2,0,0 cannot be used. Why not? so is this the same answer as lithium. The ground stat cant have l=2 since it has no p electrons? Are values of 3,0, 0 allowed? Why or why not? I would say no for the

    asked by Hannah on October 31, 2011
  75. Chemistry Help Please!

    At most, how many 4d electrons can an atom have? Of these what is the maximum number that can have ms= -1/2? A 5f electron has what value of quantum number l? What values of ml may it have? Also please explain how you got the answers so I can understand?

    asked by Kim on September 5, 2016
  76. 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?

    asked by Mileena on January 11, 2014
  77. physics

    If a proton were traveling the same speed as electrons in a TV picture tube (about 7.2 107 m/s), what would its de Broglie wavelength be? The mass of a proton is 1.67 10-27 kg.

    asked by Anonymous on April 22, 2014
  78. chemistry

    an unknown element, X, reacts with chlorine to form an ionic compound XC12, if the X ion has 18 electrons, the element X is what?

    asked by Serena Watson on November 27, 2011
  79. chemistry

    The electron configuration of the outermost electrons of the halogen group is: a)ns2np7 b)ns1 c)ns2np5 d)ns2np6(n-1)d7 e)ns2np6

    asked by lavonne on November 9, 2010
  80. physics

    what effect did scientists originally think that the intensity of light shining on a photosensitive surface would have on electrons ejected from that surface?

    asked by aaa on April 11, 2012
  81. physics

    If a more complicated atom has two energy levels for its electrons at (-15) eV and (-30.1) eV, what is the wavelength of the photon (in nm) that is emitted when an electron transitions between these two levels?

    asked by Morgan on March 25, 2012
  82. chemistry

    CoSO4 + KI + KIO3 + H2O  Co(OH)2 + K2SO4 + I2 2KI yield I2 + 2e 2KIO2 10e yield I2 are there 10 electrons being transferred or just 5 only

    asked by eng on June 6, 2010
  83. Physics

    If enough energy were supplied to a diamond would that allow some of its electrons to transition to a higher energy band and therefore conduct electricity? Just curious.

    asked by Anon on May 15, 2018
  84. Electronic Instrumentation

    Calculate the force in Newtons that exists between a positive charge of 2C and a negative charge of 5.2 X 10^19 electrons separated by a distance of 25 cm.

    asked by Kevin on May 11, 2010
  85. Physics

    To what voltages must we accelerate electrons (as in an electron microscope, for example) if we wish to resolve; a) a virus of diameter 12 nm , b) an atom of 0.12 nm, c) a proton of diameter 1.2 fm?

    asked by Abby on April 4, 2011
  86. AP Chemistry

    The principal quantum number of the electrons that are lost when tungsten forms a cation is ? Tungsten is a transition metal.

    asked by koolchem on January 13, 2013
  87. 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?

    asked by anon on March 9, 2014
  88. Physics

    Problem 22.2 2 *10 ^13 electrons flow through a transistor in 1.0 ms. Part A - What is the current through the transistor? Express your answer using two significant figures.

    asked by Paige on September 27, 2011
  89. chemistry

    In terms of chemical bonds and electrons, what kinds of changes occur between atoms when substances undego chemical reactions?

    asked by Akshay on November 24, 2008
  90. CHEMISTRY

    How many electrons are there in the p-orbital of a CH3 RADICAL (CH3.) I don't understand how it is 3.

    asked by Delli on November 25, 2007
  91. physics

    How can you tell if moving electrons are being deflected by a magnetic field, an electric field, or both?

    asked by Lucy on April 27, 2009
  92. Chemistry

    How many electrons are there in the p-orbital of a CH3 RADICAL (CH3.) I don't understand how it is 3.

    asked by Delli on November 25, 2007
  93. physics

    A metal sphere has a charge of +6.4 C. What is the net charge after 4.1 x 1013 electrons have been placed on it?

    asked by scott on October 11, 2011
  94. physics

    How many electrons pass through a wire in 5 minutes, if the current through a wire is 400 mA

    asked by satinder on June 26, 2017
  95. physics

    The charge carried by one electron is e = -1.6 × 10-19 C. The number of electrons necessary to produce a charge of -1.0 C is:

    asked by shirly on March 13, 2014
  96. chemistry

    When you touch an object, does the electrons from your hand exchange photons with the object?

    asked by Anonymous on February 24, 2014
  97. science

    A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom an ion?

    asked by anon on March 9, 2014
  98. Physics

    If 0.01% of electrons are removed from 18 gm water, then calculate the charge produced in the water.

    asked by Raj on December 2, 2016
  99. Physics

    2.0x10^13 electrons flow through a transistor in 1.0ms. What is the current through the transistor?

    asked by Anthony on February 17, 2010
  100. chemistry

    A certain element forms an ion with 54 electrons and a charge of +2. Identify the element.

    asked by Mely on September 5, 2010