Question

question 2 (1 point) which of the following pairs is considered to be isoelectronic? h and li, br - and kr, xe and i, k and ar

Explanation:

Isoelectronic species have the same number of electrons. Bromide ion ($Br^-$) has 36 electrons (35 for Br + 1 for the negative charge) and Kr has 36 electrons. The other pairs do not have the same number of electrons.

Answer:

Br⁻ and Kr