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The subatomic particles that make up atoms are protons, neutrons, and ____________________.
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ELECTRONS |
Most of the mass of an atom is concentrated in the ____________________.
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NUCLEUS
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If an atom contains 15 protons, it must contain 15 ____________________.
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ELECTRONS
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Because they have the same number of protons and electrons, all isotopes of an element have the same ____________________ properties.
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CHEMICAL
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Unlike the resulting stable compound—table salt—the two gases making up this compound are ____________________.
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EXPLOSIVE; REACTIVE
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A chemical bond formed by the transfer of electrons is a(an) ____________________ bond.
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IONIC
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Due to _________________________ forces, the structure of a gecko’s feet enables it to climb up vertical surfaces.
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VAN DER WAALS
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A water molecule is polar because there is an uneven distribution of electrons between the oxygen and the ____________________ atoms.
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HYDROGEN
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Water’s ____________________ allows it to dissolve compounds such as table salt (NaCl).
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POLARITY
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The stomach produces a(an) ____________________ to help digest food.
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ACID
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The pH scale is a measurement system that indicates the concentration of ____________________ in solution.
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IONS
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Complex carbohydrates are to monosaccharides as polymers are to ____________________.
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MONOMERS
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The elements or compounds produced by a chemical reaction are known as ____________________.
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PRODUCTS
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Chemical reactions that ____________________ energy will not occur without a source of energy.
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ABSORB
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The name of an enzyme usually ends in ____________________.
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-ASE
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