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9 Terms
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What is an atom?
Basic building block of matter.
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What defines an element?
Atoms with the same number of protons.
3
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What is a compound?
Elements chemically bonded together.
4
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What is a molecule?
A molecule is a group of two or more atoms chemically bonded together.
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What is a chemical reaction?
Rearrangement of atoms to form new substances.
7
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What are acids?
Produce H+ ions, pH less than 7.
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What are bases?
Produce OH- ions, pH greater than 7.
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What does the pH scale measure?
Acidity or basicity from 0 to 14.
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