Properties of 's' block elements

Properties of 's' block elements :

• s-block consist of two groups, group I and II.
• General electronic configuration of s-block is ns1-2  .
• Group I elements are called as Alkali metals.
• Group II elements are called as Alkaline earth metals.
• They act as good reducing agents.
• They have high electropositivity as compared to p-block and d-block.
• Because of high electropositivity, sodium is kept in kerosine.
• Lithium is the most hardest element in the group I.
• Lithium shows diagonal relationship with magnesium.
• Lithium and Magnesium both are deliquescent or hygroscopic (absorbs water molecules from atmosphere) in nature.
• Lithium and Sodium forms oxide, Potassium forms peroxide and Rubidium,Cesium forms superoxide along with peroxide and oxide on reacting with oxygen.
• Lithium and Berillium forms covalent bond on reacting with halogens whereas rest of the elements forms ionic bond.

                             

                                                                                      https://youtu.be/O3D2belxKBs