The atom can be divided into two main regions, the nucleus. and the electron clouds. The nucleus is home to neutrons and protons, which are the heavier subatomic particles. The mass of an atom, the atomic mass, is the sum of the number of neutrons and protons contained within the atom. The electron cloud is the region where the electrons of the atom are found.
this is because even though the person hasn't eaten he or she still has an amount of carbohydrates in the body that can be broken down and its end product glucose will be obtained