Which term describes a substance that increases the concentration of hydroxide ions in solution?

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock