A mystery element contains 11 electrons, the periodic table will belong to the - 1st group.
Sodium has 11 electrons revolving around its nucleus. it has an extra electron in its valency shell, which prevents it to become inert.
- it always tries to share that one electron with other mostly halogens.
- Sodium has 11 electrons -
- 2 electrons in K shell
- 8 electrons in L shell
- 1 electron in M shell
- Total number of electrons = 11
- It's electronic configuration is 1s2 2s2 2p6 3s1.
- The last electron has one electron valency and we know that elements are placed in the group on the basis of their valency.
Thus, A mystery element contains 11 electrons, the periodic table will belong to the - 1st group.
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