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Mass number on periodic table
The total number of neutrons and protons in the nucleus of an atom.
Atomic number on periodic table
The number of protons (which is equal to thenumber of electrons)
A negatively charged subatomic particle. They surround the atoms nucleus.
A subatomic particle found in the nucleus with an atomic mass of 1, and a charge of 0.
A subatomic particle found in the nucleus with an atomic mass of 1 and a charge of +1.
number of protons and electrons
is the same as each other in all atoms
smallest particle which has the same number of protons and electrons (and therefore has no charge)
Atoms of the same element that have different numbers of neutrons (but number of protons and electrons the same)
physical properties of isotopes
different density or mass
chemical properties of isotopes
The same because the still all have the same number of electrons