Please choose the correct answer to the question: A student observes zinc turning from a solid to a liquid in a laboratory investigation. Which statement describes the change in zinc atoms while melting?

Answer1: The mass of the zinc atoms decreased. Answer2: The zinc atoms lost their relative fixed position. Answer3: The zinc atoms were changed into atoms of another element. Answer4: The size of the zinc atoms decreased.

Answer format: answer1/answer2/answer3/answer4