Question

compare 2nd period elements with 3rd period elements​

Answer 1

Answer: hope it helps u

Explanation: 2nd periond elements- ● elements have 2 shells

●have eletronic configuration as 2s^2 2p^5

3rd period element- ● elements have 3 shell

● have eletronic configuration as 3s^2 3p^5

Answer 2

2nd period table :

• elements have 2 outer shell.
• the table contains Le , Be , B , C , N , O , F , Ne.
• the first shell contains maximum 2 electrons.

3rd period Table:

• elements have 3 puter shell
• the table contains Na , Mg , Al , Si, P , S , Cl , Ar.

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