Question

please help me
Which of the following two elements have similar chemical properties?
1)Element with atomic number 3 and element with atomic number 11
2)Element with atomic number 3 and element with atomic number 9
3)Element with atomic number 11 and element with atomic number
4)Both (2) and (3)​

Answer 1

Explanation:

Element with atomic number 3 and element with atomic number 11

The elements with the atomic number 3 and 11 have the same properties because both elements have same valence shell configuration, i.e., ns

1

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