What happens when oxygen atoms share electrons? - apex a. they form ionic bonds b. they form polar molecules c. they form water molecules d. they form covalent bonds

Which are forms of nitrogen that are usable by humans

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?

What characteristic makes a cell membrane selectively permeable