what are the four phase changes that result from an increase in energy and what are the four phase changes that result from a decrease in energy?

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions