1. Name all the elements of Group IA.

2. Why are the elements of the first group called Alkali Metals ?

3. What is the general electronic configuration of the first group ?

1. Li, Na, K, Rb, Cs and Fr are the elements of Group IA.

2. The oxides and hydroxides of the elements of Group IA are strongly alkaline in nature , thus giving this group its name.

3. The general electronic configuration of this group is ns¹.

4. State the atomic numbers of all the elements in Group IA.

5. How does Atomic Size vary from top to bottom in this group ?

6. How do I.P values vary from top to bottom in this group ?

1. Metal -- Z

Li - 3

Na- 11

K - 19 

Rb - 37

Cs - 55

Fr - 87

2.From top to bottom atomic size increases.

3.From top to bottom I.P decreases.

Particularly,  1st I.P to 2nd I.P there is a large difference

7. How are the metals of this group stored ?

8. What are the metals used in Photoelectric cells and why are they used ?

9. State how Metallic property and Electro positivity varies in this group.

7. The metals of this group are highly reactive. Therefore, they are stored in an inert solvent like Kerosene or Paraffin oil.

Li however, is light and floats on liquid so it is generally stored by wrapping it in Wax Paper.

8. Even sunlight can excite the electrons in these metals. Therefore, metals like K, Rb and Cs are used in photoelectric cells.

9. The metals of this group are highly metallic in nature and also highly electropositive.

Top to bottom electropositivity increases.

10. Define Heat of Hydration.

11. Why does Lithium have high heat of hydration ?

12. State order of heat of hydration of elements of Group IA.

13. Give molecular formula, structure and hybridisation of Lithium and Potassium Hydrated ions.

10. Heat of Hydration : The amount of heat energy liberated when one mole of ions gets hydrated by water molecules is called Heat Of Hydration.

11. Lithium possesses high heat of hydration due to its small ionic size with greater charge density.

12. Order of Heat of Hydration of Group IA elements : 

Li⁺>Na⁺>K⁺>Rb⁺ >Cs⁺

^{(All are aqueous)}

13. Lithium Hydrated Ion (Li⁺) is [Li(H₂O)₄]⁺  -- sp³ , tetrahedral structure

Potassium Hydrated Ion (K⁺) is [K(H₂O)₆]⁺ -- sp₃d₂ , octahedral structure