Question

1. negatively charged subatomic particles in an atoms nucleus.

a. electron
b. adhesion
c. solution
d. proton

1. measure of the concentration of hydrogen ions (h⁺) & hydroxide ions (oh⁻) in a solution; measures if a solution is acidic or basic.

a. cohesion
b. bases
c. ph
d. acids

1. substance that does the dissolving.

a. mixture
b. buffer
c. solvent
d. suspension

1. substance that releases hydrogen ions (h⁺) when dissolved in water; an acidic solution has a ph less than 7.

a. enzymes
b. acids
c. alcohols
d. lipids

Explanation:

1. Electrons are negatively charged subatomic particles, though they orbit the nucleus, not inside it; the option matches the charge description.
2. pH quantifies H⁺ and OH⁻ concentration, indicating acidity or basicity.
3. Solvent is the substance that dissolves another (solute).
4. Acids release H⁺ in water, resulting in pH < 7.

Answer:

1. a. Electron
2. c. pH
3. c. Solvent
4. b. Acids