Question

Help please
7. 0-2 is isoelectronic with
a. Helium
b. Neon
c. Argon
d. Krypton

Answer 1

Answer:

b. Neon

Explanation:

Problem;

         O²⁻ is isoelectronic with which noble gas;

   The ion of oxygen give is one that has gained two electrons.

 Atom of oxygen  = 2, 6

   gaining two electrons;

O²⁻  = 2, 8

Neon is also 2, 8

So O²⁻ is isoelectronic with neon