A substance made up of only atoms of one type is called a

An aqueous solution of calcium hydroxide is standardized by titration with a 0.120 m solution of hydrobromic acid. if 16.5 ml of base are required to neutralize 27.5 ml of the acid, what is the molarity of the calcium hydroxide solution?

Areaction in which products can react to re-form reactants is

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays