S-Block Elements - Alkali, Alkaline earth metals Explained.

The s-block elements are the metals in group 1st A, group 2nd A of the periodic table. They are called the s-block elements because s-orbitals are being filled, in their outermost shells.
The elements of group 1st A, expect hydrogen are called "Alkali Metals" while those of 2nd A are named "Alkaline earth metals".
The word alkali named from Arabic, which means "The Ashes". The Arab used this term for these metals because they found that the Ashes of plants were composed chiefly of sodium and potassium. 

Alkali Metals:

1. Lithium
2. Sodium
3. Potassium
4. Rubidium
5. Caesium
6. Francium

 They are very reactive metals, produce strong alkaline solution with water.

Alkaline Earth Metals:

1.  Beryllium
2. Magnesium
3. Calcium
4. Stroncium
5. Barium
6. Radium

They are called alkaline-earth metals because they produce alkalies in water and are widely distributed in earth's crust.
The alkali and alkaline-earth metals include the most reactive electro-positive elements and the study of their electronic configurations will help in understanding their properties.

Conclusion:

S-block contain very important and widely used elements, named alkali and alkaline earth metals.S-block elements valence electrons in s-orbital. We will discuss electronic configuration in other blog.

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