To squeeze a gas into a smaller space word

In 2002, the rare earth elements mine in mountain pass, california was closed because

Which subshell is represented by the actinides family?

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.