NEET2002Chemistryd and f Block ElementsActual
General electronic configuration of lanthanides is:
Options
- A(n-2) f¹⁻¹⁴(n-1) d⁰⁻¹ n s^2
- B(n-2) f¹⁰⁻¹⁴(n-1) d⁰⁻¹ n s^2
- C(n-2) f⁰⁻¹⁴(n-1) d¹⁰ n s^2
- D(n-2) d⁰⁻¹(n-1) f⁻¹⁴ n s^2
Correct answer
A. (n-2) f¹⁻¹⁴(n-1) d⁰⁻¹ n s^2
Step-by-step solution
The general electronic configuration is (n-2) f⁻¹⁴( n -1) d ⁰⁻¹ n s^2 Related Theory ( array |l|l| Element & array l General outer electronic configuration array s -block & n s^ l-2 , wheren n=2-7 p-block & n s^2 n p^ 4 , wheren n=2-6 d-block & array l (n-l) d¹⁻¹⁰, n s⁰⁻² , where n= 4-7 array f-block & array l (n-2) f¹⁻¹⁴(n-l) ~d^ n-1 ~f^ f-14 ~n s^2, where n=6-7 array array )