Answer:
a) Br-, Kr, Sr2+
Explanation:
plus and minus sort of mean opposite here
Br has 35
Br- has 36
Sr has 38
Sr2+ has 36
Kr has 36
in which of the following sets do all species have the same number of electrons (isoelectronic)?
a) Br-, Kr, Sr2+
b) C, N3-, O2-
c) Mg2+, Sr2+, Ba2+
d) O, O2-, O2+
Mg2+ has 10
Sr2+ has 36
Ba2+ has 54
Br- has 36
Kr has 36
Sr2+ has 36
C has 6
N3- has 10
O2- has 10
O has 8
O2+ has 6
toppr
