Question

Write the subshell electronic configuration of another element of the same period with 2 electrons in its outermost shell ?​

Answer 1

Two electronic configuration of an element 'A' are given below.

(Symbols not real)

1s

2

2s

2

2p

6

3s

2

3p

6

3d

1

1s

2

2s

2

2p

6

3s

2

3p

6

4s

1

(a) Identify the correct electronic configuration.

(b) Write the period in which the element is present in the periodic table.

(c) Consider another element 'C' with sub-shell configuration 1s

2

2s

2

2p

6

3s

1

. In which among the atoms A and C, the attraction of the nucleus towards the outermost electron is more? Give reason.