Element with atomic number 38, belongs to

Question

Element with atomic number 38, belongs to (A) IIA group and 5th period. (B) IIA group and 2nd period. (C) VA group and 2nd period. (D) IIIA group and 5th period.

Tardigrade Admin · Accepted Answer

The electronic configuration of atomic number 38 is
X ( 38)

1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2}, 3 p^{6}, 4 s^{2}, 3 d^{10} 4 p^{6}, 5 s^{2}

or

1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 3 d^{10}, 4 s^{2}, 4 p^{6}, 5 s^{2}

Hence, it belongs to IIA group and 5th period. It is strontium (Sr).

Q. Element with atomic number 38, belongs to

IIA group and 5th period.

IIA group and 2nd period.

VA group and 2nd period.

IIIA group and 5th period.

The electronic configuration of atomic number 38 is X ( 38) 1s2,2s22p6,3s2,3p6,4s2,3d104p6,5s2 or 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,5s2 Hence, it belongs to IIA group and 5th period. It is strontium (Sr).

The electronic configuration of atomic number 38 is
X ( 38) $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2}, 3 p^{6}, 4 s^{2}, 3 d^{10} 4 p^{6}, 5 s^{2}$
or $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 3 d^{10}, 4 s^{2}, 4 p^{6}, 5 s^{2}$
Hence, it belongs to IIA group and 5th period. It is strontium (Sr).