Chapter 3 Vocabulary Review

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Group of symbols showing the number and kind of each atom in a compound.

Protein that lowers the energy needed to start a reaction.

Type of bond formed when atoms combine by SHARING electrons.

Region occupied by electrons moving around the nucleus of an atom

Substance composed of only 1 type of atom

Minimum amount of energy needed to start a chemical reaction

Energy of position, or stored energy

Compound that is the building block of a protein molecule