Term
|
Definition
number of
protons in its nucleus |
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Term
|
Definition
sum of
protons plus neutrons in the nucleus |
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Term
|
Definition
atom’s total mass, can be
approximated by the mass number |
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Term
|
Definition
two atoms of an element that
differ in number of neutrons |
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Term
|
Definition
decay spontaneously,
giving off particles and energy |
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|
Term
Some applications of radioactive isotopes in
biological research are |
|
Definition
Dating fossils
– Tracing atoms through metabolic processes
– Diagnosing medical disorders |
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Term
|
Definition
the sharing of a pair of
valence electrons by two atoms |
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Term
|
Definition
an atom’s attraction for
the electrons in a covalent bond |
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Term
|
Definition
atoms
share the electron equally |
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Term
|
Definition
atoms
share the electron equally |
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Term
|
Definition
one atom is
more electronegative, and the atoms do
not share the electron equally |
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Term
|
Definition
| A charged atom (or molecule) is called an |
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
attraction between an
anion and a cation |
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|
Term
| ionic compounds, or salts |
|
Definition
| • Compounds formed by ionic bonds are called |
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Term
|
Definition
a
hydrogen atom covalently bonded to
one electronegative atom is also
attracted to another electronegative
atom |
|
|
Term
| Van der Waals interactions |
|
Definition
attractions
between molecules that are close together as a
result of these charges |
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Term
|
Definition
The starting molecules of a chemical
reaction |
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Term
|
Definition
The final molecules of a chemical reaction
are called |
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|
