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The electronic configuration of Sodium is 1s^2 2s^2 2p^6 3s^2. What information that it gives?

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The electronic configuration of Sodium is 1s2 2s22p63s2. What information that it gives?

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1. Its atomic number is 11 

2. It is s-block element 

3. It is in 3rd period ’ 

4. It is in 1st group 

5. Its valency is 1 

6. Number of valency electrons are 1 

7. It can form uni positive ion 

8. It can form ionic bond, 

9. It is metal.

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