Question

In which of the following sets do all species have the same number of electrons

a.) I-, Xe, Ba2+
b.) C,N3-, O2-
c.) Sr2+, Ba2+, Ra2+
d.) S, S2-, S2+

Answer 1

a)......,.............

Answer 2

Option a

Step-by-step explanation:

a)
`I^-`

Atomic number of I = 53

No. of electrons = atomic number + no. of negative charge

= 53 + 1 = 54

Xe

Atomic number of Xe = 54

In a neutral atom, no. of electron is equal to no. of protons.

So. no. of electron in Xe = 54

a)
`Ba^(2+)`

Atomic number of I = 56

No. of electrons = atomic number - no. of positive charge

= 56 - 2 = 54

All the species in the set a have 54 electrons.