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Chemistry of Life

Across
negatively charged particle; located in the space surrounding the nucleus
pure substance that consists entirely of one type of atom
slight attraction that develops between oppositely charged regions of nearby molecules
atom that has a positive or negative charge
chemical bond formed when one or more electrons are transferred from one atom to another
in cells, structure that contains the cell's genetic material in the form of DNA
Down
substance formed by the chemical combination of two or more elements in definite proportions
type of bond between atoms in which the electrons are shared
the basic unit of matter
smallest unit of most compounds that displays all the properties of that compound
one of several forms of a single element, which contains the same number of protons but different numbers of neutrons