Question

Write the name and deduce the atomic number of the following atoms: (a) the third alkali metal (b) the fourth noble gas (c) the third halogen (d) the second transition metal of 3d-series.​

Answer 1

Answer:

A)Rubidium

Atomic number-37

B)Radon

Atomic number-86

C)Cerium

Atomic number-58

D)There is no fifth element in first transition series