Chemistry Cheat Sheet: Atoms & the Periodic Table
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10 Terms
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Protons, electrons, and neutrons are all _________ ____________.
Subatomic particles
2
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Which two subatomic particles are located in the nucleus?
Protons and neutrons.
3
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What is an electrons charge?
-1
4
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The atomic number is the __________ __ __________.
Number of protons
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Protons + neutrons =?
The mass number
6
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What does it mean if an atom is neutral?
The number of protons and electrons are the same.
7
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What is an ion?
An atom that gains or loses electrons.
8
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What is an isotope?
Atoms of the same element with different numbers of neutrons.
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What are valence electrons?
Outer shell electrons involved in chemical binding.
10
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What is chemical reactivity determined by?
Valence electrons.
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