You have discovered a new element called element X. Element X has two isotopes. X-50 has a percent abundance of 80%. X-56 has an abundance of 20%. What is the atomic mass of element x?

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.