chemistry terms
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5 Terms
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What is an atom?
The smallest unit of matter that retains an element's chemical identity.
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Define a molecule.
A group of two or more atoms held together by chemical bonds.
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What is a chemical reaction?
A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in its physical form or a nuclear reaction.
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What is an element?
A pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
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How is a covalent bond formed?
A covalent bond is formed when atoms share electrons to achieve a stable electron configuration.
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