Substrates bind to an enzyme's active site.

Catalysts increase the rate of a reaction by increasing the net energy change of the reaction

A chemical reaction is the process where atoms or groups of atoms in substances are reorganized to diff. substances

Van der Waals forces are attractive forces between molecules

An ionic bond is formed when two atoms share electrons

All the elements in a period (across one period) on the periodic table have the same number of protons.

Elements are pure substances and cannot be broken down into other substance by physical or chemical means

When atoms share electrons the form covalent bonds

When a mixture changes color or heats up it proves that a physical reaction has happened

Polar molecules are those with an equal distribution of charges

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