What keeps the particles of a liquid from spreading out to fill an entire container in the same way that gas particles do?

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

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

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as