Answer:
Liquids and gases.
For most substances, when heated to a high enough temperature, the molecules begin moving faster which results in its liquid or gas state.
Answer: An alpha-particle is identical to the nucleus of a normal (atomic mass four) helium atom i.e. a doubly ionised helium atom. Alpha particles (also termed alpha radiation or alpha rays) was the first nuclear radiation to be discovered, beta particles and gamma rays were identified soon after.
A "FORCE" is required to cause acceleration or cause an object to move.
