Question

Choose the correct alternative from the option given below.
i) An element 23 X 11 will have electronic configuration
A) 2,8,8,6
B) 2,8,1
C) 2,8,2
D) 2,8,8,7
ii) The chemical formula for Ferric oxide is
A) Feo
B) Fez(SO4)3
C) Fe2O3
D) Fe304​

Answer 1

Answer:

Z Element No. of electrons/shell

18 Argon 2, 8, 8

19 Potassium 2, 8, 8, 1

20 Calcium 2, 8, 8, 2

21 Scandium 2, 8, 9, 2

Explanation:

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