atomic mass
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| conducted an experiment- flying a kite with a key | Franklin
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| these have a mass of 1 atomic mass unit (AMU) | protons and neutrons
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| the charge and mass number number of a neutron are | charge=0, mass number= 1
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| the nucleus of most atoms is made up of | protons and neutrons
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| the nucleus of the atom is held together by | nuclear forces
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| what constitutes most of the volume of an atom | shells or orbitals
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| the atomic number of an element is equal to | the number of protons in the atom
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| the mass number of an atom is determined by | adding the neutrons and protons
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| the charge and mass number of an electron are | charge= -1,mass number= 0
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| which of the following descriptions apply to the nucleus | charges
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| most of the mass of the atom can be found in the | nucleus
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| the charge and mass number of a proton are | charge= 1, mass number= 1
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| the laws of electrostatics consistently demonstrate that "like" (identical) charges | attract
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| isotopes are atoms of the same element that differ in | the mass number
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| from rutherfords experiment could be deduced | the atom is mostly empty space
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| a proton | none of the above
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| the mass number | is the average mass of the isotopes of that atom
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| an electron | has a mass of almost zero
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| isotopes are | atoms of the same element with a different number of neutrons
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| alpha particles are | the same as a helium-nuclei
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| in bohrs atomic model | the electrons move around the nucleus in a circle or orbits
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| which is not true? | all are false
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| devised the "gold foil experiment" | rutherford
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| plum pudding model. positively charged goo with negative chunks randomly scattered | thompson
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| created the law of conservation of matter | lavosier
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| thompson found that atoms could sometimes eject a far smaller negative particle which he called an | electron
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| rutherford found that they fired a ____ at a piece of gold foil which was only a few atoms thick | helium-nuclei or an alpha particle
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| with electronic configuration elements are represented numerically by the ___ in their shells and numbers of shells | number of electrons
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| which is not true? | atoms of different elements contain different number of electrons
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| isotopes of any particular element contain the same number of ___, but different numbers of ___ | protons and neutrons
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| who suggested that all matter was made up of tiny spheres that were also to bounce around with perfect elasticity | dalton
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| his new evidence allowed him to propose a more detailed model with a central nucleus | rutherford
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| which is not alpha decay | Bismuth-214 to Polonium-214
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| which one is alpha decay | Polonium-214 to lead-210
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| radium-224 alpha decay | Rn 220 and He Nucleus
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| radon-219 alpha decay | Po 215 and He Nucleus
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| bismuth-210 beta decay | Po 210 and electron
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| bismuth-214 beta decay | Po 214 and electron
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| Dalton was wrong about the atom because of two reasons | atoms can be split and isotopes
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| which is true | all are true
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