One reason people around the world use coal as an energy source is

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?