When two atoms of the same nonmetal react, they often form?

There are main groups in the modern periodic table of elements

What are the 4 phases of matter in order of increasing engery content?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?