Question

The tenth elements in the periodic table resembles with the

• A. First period
• B. Second period
• C. Fourth group
• D. Ninth group

Answer 1

The correct option is B

Second period

Each period consists of a series of elements whose atom have the same principal quantum no.(n) of the outer most shell i.e. In second period n=2, this shell has four orbitals (one 2s and three 2p) which can have eight electrons, hence second period contains 8 elements from atomic no. 3 to 10.