Below is a Bohr model of Sulfur. The effective nuclear charge (Zeff) is... please help

Question

Below is a Bohr model of Sulfur. The effective nuclear charge (Zeff) is...

1. a. 16
2. Selected:b. 5This answer is incorrect.
3. c. 4
4. d. 6

Answer 1

Based on the options, the answer is 6.

To do this, you count the valence (outermost) electrons in the orbit. In this case, it is 6.

Z_eff by definition is the net effective nuclear charge experienced by the outermost electrons. The actual value is 5.45 and is smaller than 6 due to screening (repulsive effects) of the inner electrons on the outermost electrons and thereby, reduce the effect of the nucleus on the outermost electrons.