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Related Flashcards
Cards In This Set
| Front | Back |
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Subatomic particles can usually pass undeflected through the atom because the volume of an atom is composed of
a- an uncharged nucleus b- largely empty space c- neutrons d- protons |
B
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Atomic Mass =
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Total number of
protons + neutrons |
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Atomic number =
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Number of protons
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Charge-
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Number of extra protons or number of extra electrons
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Number of neutrons =
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Mass - atomic number
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Which particles are found in the nucleus of an atom?
a- electrons only b- neutrons only c- protons and electrons d- protons and neutrons |
D
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The number of neutrons in the nucleus of an atom can be determined by
a- adding the atomic number ot the mass number b- subtracting the atomic number from the mass number c- adding the mass number to the atomic mass d- subtracting the mass number from the atomic number |
B
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And electron has a charge of
a- 1- and the same mass of a proton b- 1+ and the same mass as a proton c- 1- and a smaller mass than a proton d- 1+ and a smaller mass than a proton |
C
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The atomic number of an atom is always equal to the number of its
a- protons only b- neutrons only c- protons plus neutrons d- protons plus electrons |
A
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Which subatomic particle has no charge
a- alpha particle b- beta particle c- neutron d- electron |
C
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Which electon transition represents a gain of energy
a- from 2nd to 3rd shell b- from 2nd to 1st shell c- from 3rd to 2nd shell d- from 3rd to 1st shell |
A
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What is the electron configuration of a sulfer atom in the ground state?
a- b- c- d- |
D
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Which electon configuration is correct for a soduim ion?
a-2-7 b-2-8 c-2-8-1 d-2-8-2 |
B
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Which particle has the same electron configuration as a potassiou ion?
a- fluoride ion b- sodium ion c- neon atom d- argon atom |
D
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The nucleus of an atom of K-42 contains
a- 19 protons and 23 neutrons b- 19 protons and 42 neutrons c- 20 protons and 19 neutrons d- 23 protons and 19 neutrons |
A
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