As volume increases, the temperature will increase.
As volume decreases, the temperature will decrease.
Isotopes of an element will contain the same number of protons and electrons but will differ in the number of neutrons they contain. In other words, isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.
When something changes state.
For example solid to a liquid
Liquid to a gas
