Question

What is the effective nuclear charge of al ?

Answer 1

Ans

Al 13 Atomic no.

shells Effective nuclear charge

1s 12.591

2s 8.214

2p 8.963

3s 4.117

3p 4.066

The effective nuclear charge is the net positive charge experienced by an electron in a polyelectronic atom. The term "effective" is used because the shielding effect of negatively charged electrons prevents higher orbital electrons form experiencing the full nuclear charge of the nucleus due to the repelling effect of inner-layer electrons

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