Unit 1

Solutions that have a higher concentration of H+ (aq) ions than OH- (aq) ions and have a pH below 7

Solutions that have a higher concentration of OH- (aq) ions than H+ (aq) ions and have a pH above 7

Substances that speed up chemical reactions but can be recovered chemically unchanged at the end of the reaction.

Forms when two positive nuclei are held together by their common attraction for a shared pair of electrons.

7 elements exist as diatomic molecules through the formation of covalent bonds: H2, N2, O2, F2, Cl2, Br2, I2

Formed when atoms lose or gain electrons to obtain the stable electron arrangement of a noble gas

The electrostatic attraction between positive and negative ions

Atoms with the same atomic number but different mass numbers, or Atoms with the same number of protons but different numbers of neutrons

The mass of any substance, in grams equal to the gram formula mas

A solution that has equal concentrations of H+(aq) and OHˉ(aq) ion

A reaction in which a base reacts with an acid to form water. A salt is also formed in this reaction

Spectator ions are ions that remain unchanged by the reaction