One method for calculating $Z_{eff}$ is to use the equation:
$Z_{eff} = \sqrt{\frac{(E) (n^{2})}{1312 kJ / mole}}$
Where E is the energy necessary to remove an electron from an atom and n is the principal quantum number of the electron. Use this equation to calculate $Z_{eff}$ a value for the highest energetic electron in potassium. $E = 418.8 kJ / mole$

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

2.86

2.26

3.26

2.00

answer is B.

(Unlock A.I Detailed Solution for FREE)

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Given,

$E = 418.8 kJ / mole$

The principal quantum number is, n=4

The formula for finding the Z effect is,

$Z_{eff} = \sqrt{\frac{(E) (n^{2})}{1312 kJ / mole}}$

Substitute the given values,

$Z_{eff} = \sqrt{\frac{418.8}{1312} \times 4^{2}}$

$Z_{eff} = = 2.26$

Watch 3-min video & get full concept clarity

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test