Question

write electronic configuration and valency of elements whose atomic number is 23..

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Answer 1

1 Answer. Since, atomic number is 13, and hence, electronic configuration is 2, 8, 3, thus the element is aluminium and its valency is three.

Answer 2

Answer:

Explanation:

given atomic number: 23

electronic configuration: 1s2    2s2 2p6    3s2 3p6 3d3     4s2

valency= 5,4