Why atom move at different speeds depending on wether they are in liqud or solid?

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

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