1. what can noble gases be used for?

2.
what is a vertical column called in the periodic table

3.
what is the horizontal column in the periodic table

If two objects at different te,peraure are in contact with each other what happens to their temperature

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released