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chemical bond

is a force that holds two or more atoms together.

valence electron

is an outermost electron of an atom that participates in chemical bonding.

electron dot diagram

a model that represents valence electrons in a atom as dots around the element's chemical symbol.

covalent bond

is a chemical bond formed when two atoms share one or more pairs of valence electrons.

chemical formula

is a group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.

ion

is an atom that is no longer electrically neutral because it has lost or gained valence electrons.

ionic bond

the attraction between positively and negatively charged ions in an ionic compound

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