Which group in the Periodic Table contains elements that are all monatomic gases at STP?

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?

Why does a cake rise when you bake it? ♡

What is the lowest number energy level where a d sublevel is found