![]() | two atoms that have the same number of protons, but a different number of neutrons |
![]() | two atoms that have the same number of neutrons, but a different number of protons |
![]() | two molecules that have the same molar mass, but have different physical properties |
![]() | two atoms that have the same electrical conductivity |
![]() | two molecules that have the same formula, but whose atoms are arranged differently |