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Biology 120 Notes (Part 2) Continuing the Discussion of Atoms and Other Molecules
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1
Salts
________ are sold substances that usually sperate and exist as individual ions in water.
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2
Electronegatives
________ describe the strength with which atoms pull electrons toward themselves.
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3
Electrons
________ are not always shared equally.
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4
hydrogen bond
A(n) ________ is a weak attraction between a slightly positive hydrogen atom and a slightly negative tom in another molecule.
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5
Molecules
________ are atoms held together by chemical bonds.
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6
Covalent bonds
________ are a type of bond that describes how electrons are shared.
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7
octet rule
The ________ is a rule describing how a valence shell can only hold eight electrons (unless the atomic number is two or less .)
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8
ionic bind
A(n) ________ forms when electrons are transferred from one atom to another.
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9
ion
A(n) ________ is a charged atom.
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10
Electrons
________ are attracted to the nucleus; it takes energy to hold ________ in place.
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11
Covalent bonds
________ can either be polar or nonpolar.
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12
Electrons
________ determine chemical behavior of atoms.
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13
There are three types of covalent bonds which are called
ionic, covalent, and hydrogen
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14
valence shell
The __________is the outermost energy shell.
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15
Isotopes
__________ deal with neutrons in the atom.
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