Question

For a given atom if n=3,l=2,ml= -1 , ms = +1/2. What could be the atomic number, electronic configuration and the valency.
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Answer 1

Answer:

Quantum numbers are n=3, l=1, m

l

=0, m

s

=±1/2. This set of quantum numbers represents the last electron to be added to complete the ground state electron configuration of an element. From the quantum numbers, we can say that the last electron enters 3p orbital. The quantum number l with value 1 corresponds to p orbital. The symbol of the element could be Si. The electronic configuration of Si is 1s

2

2s

2

2p

6

3s

2

3p

2