Question

Use Slater's rules to estimate Zeff for the calcium atom and scandium atom.

Answer 1

0 slater's Rule of 's to estimate Zeff. for (ns up) group electrons: 1. contribution to 6 by electrons lying above the groups 3 clways zero. 2. contribution to o' by electrons lying in the same groups ] 0.35 each. (except for 1s eleetoong ile is 0.30 ) 3. Contribution to y by electrons lying in the (n-1) th group for below is 0.85 each, f. contribution to 'o' by electrons bying in the relih group for below is 1.0 each. for (na) and (nf) grup electoons: Rule 1 and 2. remain same. Rule 3. Contribution to ö' by electrons lying in (n-1) 7th gorap o below is 1.0 eaen. 6 in o valee of ca ca »> (159%85?2p)(3322pg) (452) 10 = 3( 2x0.35) + (8x 9:86) + (10x1)} = 17.5 Redl= 2-6 - 20-17.5 22.5 o value of 3 candium (se) 225e » (192) (8322pg) (3,23pg (432 pp) @ = 3x0.96) +(8x0.89)+(10x)} - 17.85 in Zeff: 2-6 2 21-19.85 & 3.15