Question

the mass of an atom is located in the __________ and the volume of an atom is made of the __________

nucleus, neutrons electron cloud, energy levels nucleus, electron cloud electron cloud, nucleus

Explanation:

An atom consists of a nucleus (containing protons and neutrons, which have significant mass) and an electron cloud (where electrons are located, and electrons contribute to the volume of the atom as they occupy a large space around the nucleus).

Answer:

nucleus, electron cloud