Question

for each of the following ions, indicate the noble gas that has the same lewis structure as the ion.

express your answer as a chemical symbol?

BR-

O2-

Rb+

Ba2+

Answer 1

1. Br^-: Number of electrons in Br^- = 35 + 1 = 36. Noble gas that has 36 electrons is Krypton, Kr. So, the noble gas that has the same Lewis structure to Br^- is Kr.

2. O^2-: Number of electrons in O^2- is 8 + 2 = 10. Noble gas that has 10 electrons is Neon, Ne. So, the noble gas that has the same Lewis structure as O^2- is Ne.

3. Rb⁺: Number of electrons in Rb⁺ = 37 - 1= 36. Noble gas that has 36 electrons is Kr. So, the noble gas that has the same Lewis structure as Rb⁺ is Kr.

4. Ba²⁺: Number of electrons in Ba²⁺ = 56 - 2 = 54. Noble gas that has 54 electrons is Xenon, Xe. So, the noble gas that has the same Lewis structure as Ba²⁺ is Xe.