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indicates the number and types of atoms in a molecule
identifies a specific element; equals the number of protons in an atom of each element
atoms that have lost or gained electrons
atoms that are held together by covalent bonds
a pure substance that cannot be broken down into other substances by chemical reactions
indicates the formation of new substances from previous substances
a covalent bond in which four valence electrons are shared between two atoms
interaction of substances that lead to the formation of new substances
shows the number and types of atoms in a molecule and how they are arranged
substance containing two or more elements chemically combined in a fixed ratio
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ion
atoms that have lost or gained electrons
structural formula
shows the number and types of atoms in a molecule and how they are arranged
compound
substance containing two or more elements chemically combined in a fixed ratio
chemical reaction
interaction of substances that lead to the formation of new substances
chemical formula
indicates the number and types of atoms in a molecule
element
a pure substance that cannot be broken down into other substances by chemical reactions
synonyms: chemical element, member.
atomic number
identifies a specific element; equals the number of protons in an atom of each element
molecule
atoms that are held together by covalent bonds
chemical reaction
indicates the formation of new substances from previous substances
