Question

How many electrons can be placed in the following:

1) A set of 4d orbital:

2) 2pz orbital

3) 7s orbital

4) n=8 shell

Answer 1

Any sub-shell (or an orbital ) occupies a maximum of 2 electrons(one with spin = + 1/2 and the other with spin = -1/2).

Example 2P_x​ , 2P_y, 3d_xy

4) n =8 shell

Number of electrons in each shell are given bu the formula 2n²​ where n is the shell number

Here n =8 so the number of electrons are given by 2(8)²​ = 2 x 64 = 128 electrons

2) 2p_z​ orital can occupy a maximum of 2 electrons (one with spin = + 1/2 and the other with spin = -1/2)

(p_z​ orbital is one of the three sub shells of a p - orbital (p_x , p_y , p_z​ )

1) A set of 4d orbital (There are 5 set of orbitals, i.e., d_xy , d_yz​ , d_zx , d_x²-y², d_z² )

Each orbital occupies a maximum of 2 electrons

5 d-orbitals occupies a maximum of 5 x 2 = 10 electrons

3) 7S orbital , a S-orbital have only one sub shell, so it will occupy a maximum of 2 electrons