The ratio between protons and neutrons is very important.
The stability of an atom is determined by the:
The physical size of an atom is largely determined by the size of the electron cloud.
The stability of an atom is determined by the:
By the size of the atom and its mass
The number of protons in the nucleus of the atom.
Mass of an atom is determined by the no. of protons+ no. of neutrons in the atom.
By the atomic mass
Different isotopes of an atom are determined by the number of neutrons it contains.
The atomic number of an atom is determined by the number of protons it has.
Protons
The Atomic Number
Protons, neutrons and electrons