Alklali metals do not exist in free state in nature because these are

Options

A. Very reactive
B. Very volatile
C. Metallic in nature
D. Highly electtronegative elements.

Explanation

### Step-by-Step Solution:

1. **Understanding Alkali Metals**: Alkali metals belong to Group 1 of the periodic table and include lithium, sodium, potassium, rubidium, cesium, and francium. They have a single electron in their outermost shell, which is represented by the electronic configuration \( ns^1 \).

2. **Low Ionization Energy**: Alkali metals have low ionization energies, meaning they can easily lose their outermost electron. This property makes them highly reactive. When they lose this electron, they achieve a stable noble gas configuration.

3. **Reactivity with Atmospheric Elements**: Due to their high reactivity, alkali metals do not exist in their free state in nature. Instead, they readily react with elements present in the atmosphere, such as oxygen, nitrogen, and moisture (water vapor).

4. **Formation of Compounds**: When alkali metals react with oxygen, they form metal oxides. For example, sodium reacts with oxygen to form sodium oxide. Similarly, they can react with moisture to form hydroxides. These reactions lead to the formation of stable compounds rather than allowing the metals to remain in their elemental form.

5. **Conclusion**: Therefore, the reason alkali metals do not exist in the free state in nature is that they are very reactive. They readily form compounds with atmospheric elements, which prevents them from being found as free metals.

### Final Answer:
Alkali metals do not exist in free state in nature because they are very reactive.

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