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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.


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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