Question

Atomic number of copper is 29. The number of electrons in the d sub shell and last sub shell are ...... & ...... respectively.

Answer 1

Answer:

Copper ' s configuration

1s2 , 2s2 , 2p6 , 3s2 , 3p6 , 4s1 , 3d10

Therefore,

No. Of electrons in d = 10

Last sub shell is "s".

Answer 2

Answer

Cu

+

=1s

2

2s

2

2p

6

3s

2

3p

6

3d

10

Shells occupied =3(n=1,2,3),

Subshells occupied=6

Filled orbitals=14 (1+1+3+1+3+5)

Unpaired e

−

=0

Hence, the correct answer is option C.