Question

Because the members of an isoelectronic series all have the same number of electrons, they all have the same size.

a) True
b) False

Answer 1

False, members of an isoelectronic series do not have the same size.

Step-by-step explanation:

Atoms and ions that have the same electron configuration are said to be isoelectronic. While isoelectronic species have the same number of electrons, their size is determined by the number of protons in the nucleus. The greater the nuclear charge, the smaller the radius in a series of isoelectronic ions and atoms. So, even though they have the same number of electrons, members of an isoelectronic series do not have the same size.