How many possible orbitals are there for n = 3?

Which substances have the lowest melting points: ionic covalent, or metallic

Which best describes why nh4+ can form an ionic bond with ci-?

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%