Atom is made of neutrons, electrons and protons.
The neutrons has neutral charges.
The proton has positive charges.
The electron has negative charges.
Atom consists of electron shell that will cause chemical reactions to occur.
The alignment of the atom can cause the hardness of the thing to change.
Atom has a nucleus that consists of the protons and neutrons.
The proton number is the atomic number.
The atom is the simplest form of an object.