The element of IA group which combines directly with nitrogen is-

Options

A. `Li`
B. `Na`
C. K
D. `Cs`

Answer

To solve the question of which element of group IA (alkali metals) combines directly with nitrogen, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Group IA Elements**:
The elements in group IA (alkali metals) are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs).

2. **Understand Nitrogen's Properties**:
Nitrogen (N) is a highly electronegative element with an electronic configuration of \(1s^2 2s^2 2p^3\). This indicates that nitrogen has a strong tendency to gain electrons.

3. **Determine Electropositivity of Alkali Metals**:
Electropositivity increases down the group in alkali metals. Lithium is the most electropositive element in this group, followed by sodium, potassium, rubidium, and cesium.

4. **Combine Electropositivity with Nitrogen's Reactivity**:
Since nitrogen is highly electronegative, it will react readily with the most electropositive element available. Among the alkali metals, lithium is the most electropositive.

5. **Conclusion**:
Therefore, lithium (Li) is the element from group IA that combines directly with nitrogen.

### Final Answer:
The element of IA group which combines directly with nitrogen is **Lithium (Li)**.

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