The number of electrons is the valence shell of the central atom of a molecules is 8 . The molecule is

Question

The number of electrons is the valence shell of the central atom of a molecules is 8 . The molecule is (A)  BCl3  (B)  BeH2  (C)  SCl2  (D)  SF6

Tardigrade Admin · Accepted Answer

ln SCl 2, number of lone pairs on S =(6-2(1)/2)=2 ∴ Total number of pairs of electrons =2 bonding +2 lone pairs =4 pairs ∴ Total number of electrons in valency shell =4 × 2=8

Q. The number of electrons is the valence shell of the central atom of a molecules is $8$ . The molecule is

$BC l_{3}$

$B e H_{2}$

$SC l_{2}$

$S F_{6}$

$ln SC l_{2}$ , number of lone pairs on $S = \frac{6 - 2 ( 1 )}{2} = 2$

$∴$ Total number of pairs of electrons $= 2$ bonding $+ 2$ lone pairs $= 4$ pairs

$∴$ Total number of electrons in valency shell $= 4 \times 2 = 8$

Q. The number of electrons is the valence shell of the central atom of a molecules is 8 . The molecule is

BCl3​

BeH2​

SCl2​

SF6​