Question

s-block elements are:
(A) Elements of group I-A and III-B
(B) Elements of group I-A and II-A
(C) Elements of group I-A and I-B
(D) Elements of group I-A and II-B

Answer 1

Hint: Take a look at the periodic table. Find out the location where s-block is placed in the periodic table. The elements of s-block are also known as alkali metals and alkaline earth metals.


Complete step by step solution:
- Let’s take a look at the periodic table.
- The first two groups on the left hand side of the periodic table are called ‘s-block’ of the periodic table. ‘s-block’ comprises alkali metals and alkaline earth metals.
- The last six groups of the periodic table is known as the ‘p-block’ of the periodic table. ‘p-block’ comprises boron family, carbon family, nitrogen family, chalcogens, halogens and inert gas elements.
- The middle ten groups in between s-block and p-block are known as ‘d-block’ of the periodic table. ‘d-block’ elements comprises transition metals. Lanthanide series and Actinide series are known as ‘f-block’ elements.
- s-block consists of group I-A and group II-A.
- Group I-A is known as alkali metals and contains lithium, sodium, potassium, rubidium, caesium and francium.
- Group II-A is known as alkaline earth metals and contains beryllium, magnesium, calcium, strontium, barium and radium.
- Therefore, s-block elements are elements of group I-A and II-A.

- Therefore, the correct answer is option (B).


Note: s-block consists of the first two groups of the periodic table, group I-A and group II-A. The elements of the first group are known as alkali metals and the elements of second group are known as alkaline earth metals.