What usually happens to the outer electrons of metallic atoms when they combine chemically with nonmetallic atoms?

They will mostly fill the octet rule rather than the nonmetal counterparts. Especially in the case of hydrogen

1.from liquid state to gaseous state is evaporation 3.solid to liquid is melting 5. solid to gaseous state is sublimation 6. gas to solid state is decomposition 7. a change of state is known as the states of matters