Plasma is the rarest state of matter on earth.
It is in a solid state at room temperature. Europium is the most reactive of the rare earth elements.
None. Xenon is not a rare earth nor has it ever been a rare earth or considered becoming one!
Holmium is a rare earth metal.
Hassium is not a rare earth element; but is an artificial element, extremely rare and very difficult to obtain.
Helium is generally believed to be the second most abundant element, but almost all of it is present in stars.
The phases are solid, liquid, and gas. Plasma is a fourth state of matter relatively rare on earth, but is the most abundant phase of matter in the universe.
The state of matter the Earth's crust is in is solid.
the state of matter for the earth's crust is continental and oceanic.
The most common state of matter in the universe is plasma. Plasma is a state of matter which consists of ionized gas. Although this phase of matter is rare in on earth, it makes up stars and is widespread throughout the universe.
This state of matter is gas.
The earth's crust is generally solid.
Soild
dark.
Liquid
Liquid
Liquid
Liquid