Which element is represented by the following electron configuration.
1s2 2s22p6 3s23p6 4s2 3d5

Nickel

Magnesium

Iron

Manganese

Question 13 Which element is represented by the following electron configuration. 1s2 2s22p6 3s23p6 4s2 3d10 4p4

Te

As

S

Se