An arrhenius base yields which ion as the only negative ion in an aqueous solution?
(1) hydride ion (3) hydronium ion
(2) hydrogen ion (4) hydroxide ion

Arrhenius bases are substances which produces hydroxide ions in solution. The only negative ion in an aqueous solution is the hydroxide ion. The answer is number 4.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.