Question

Tenth element in periodic table resembles with the________.

• A. first period
• B. second period
• C. fourth period
• D. ninth period

Answer 1

The correct option is B second period

Each period consist of series of element whose atom has same principal quantum number of outermost shell i.e in second period n= 2 this shell has 4 orbitals which can have 8 electrons hence second period contain 8 element from atomic number 3 to 10.