If core electrons completely shielded valence electrons from nuclear charge (i. e., if each core electron reduced nuclear charge by 1 unit) and if valence electrons did not shield one another from nuclear charge at all, what would be the effective nuclear charge experienced by the valence electrons of the following atoms?

(a) - K

(b) - Ca

(c) - O

(d) - C

Question

Nikolas Murray

Chemistry

11 July, 15:50

If core electrons completely shielded valence electrons from nuclear charge (i. e., if each core electron reduced nuclear charge by 1 unit) and if valence electrons did not shield one another from nuclear charge at all, what would be the effective nuclear charge experienced by the valence electrons of the following atoms?

(a) - K

(b) - Ca

(c) - O

(d) - C

+5

Answers (1)

Know the Answer?

Katelyn Leonard · Answer 1

The effective nuclear charges experienced by the valence electrons of:

a. K = + 1

b. Ca=+2

c. O=+6

d. C=+4

Explanation:

Since one core electron reduces the nuclear charge by 1 unit we know that the nuclear charge = proton number = atomic number. The core electrons are electrons that are not valence electrons hence:

Potassium has 19 protons and 18 core electrons which means it has an effective charge of + 1.

Calcium has 20 protons and 18 core electrons which means it has an effective charge of + 2.

Oxygen has 8 protons and 2 core electrons which means it has an effective charge of + 6.

Carbon has 6 protons and 2 core electrons which means it has an effective charge of + 4.