electronic configuration of element A is 2,8,1 what is atomic number of A and 10 ? & which group this element belong
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This is chemistry but okay...
the atomic number of A is 11 because atomic number is equal to the number of protons and electrons.
A belongs to the group 1 because group 1 elements/alkalis all have only 1 electron in their outermost shell.
Hope it helps!
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