What do we call atoms of different elements that have the same number of neutrons, meaning the difference between their mass number and atomic number is identical?

Explanation

Isomers are molecules with the same formula but different structures. Isotopes are atoms of the same element with different neutron counts. Isobars are atoms with the same mass number but different atomic numbers. Isotones are atoms from different elements that have an equal number of neutrons, meaning their mass number minus atomic number is the same.