Question

The number of s-block elements in the present form of periodic table

Answer 1

Answer:

14 elements

Explanation:

S block comprises of 14 elements: hydrogen (H), lithium (Li), helium (He), sodium (Na), beryllium (Be), potassium (K), magnesium (Mg), rubidium (Rb), calcium (Ca), cesium (Cs), strontium (Sr), francium (Fr), barium (Ba), and radium (Ra).

Answer 2

Answer and Explanation:

$\blacksquare$ s-block element are elements whose final electron is placed in the s-orbital

$\blacksquare$ The s-block consists of 2 groups namely :

1. Group 1 $\implies$ Alkali metals
2. Group 2 $\implies$ Alkaline earth metals

$\blacksquare$ The alkali metals is consituted of the following elements :

1. Lithium $\implies$ Li
2. Sodium $\implies$ Na
3. Potassium $\implies$ K
4. Rubidium $\implies$ Rb
5. Caesium $\implies$ Cs
6. Francium $\implies$ Fr

$\blacksquare$ The alkaline earth metals is constituted of the following elements :

1. Beryllium $\implies$ Be
2. Magnesium $\implies$ Mg
3. Calcium $\implies$ Ca
4. Strontium $\implies$ Sr
5. Barium $\implies$ Ba
6. Radium $\implies$ Ra

$\blacksquare$  Hence, the s-block has 6+6 = 12 elements in it