Valence Electrons and Molecular Structure

Dr. B explains how to draw the Lewis structure for sulfur dibromide (SBr2). He starts by identifying the number of valence electrons for sulfur and bromine, totaling 20. Sulfur is placed in the center with bromine atoms on either side. Valence electrons are distributed to form bonds and satisfy the octet rule for each atom. The video concludes with a review of the completed Lewis structure.

Which group does sulfur belong to on the periodic table?

• Group 8

• Group 7

• Group 6

• Group 5

How many total valence electrons are there in sulfur dibromide (SBr2)?

• 16

• 18

• 20

• 22

Why is sulfur placed in the center of the SBr2 molecule?

• It has the smallest atomic radius

• It is the least electronegative

• It has the highest atomic number

• It is the most electronegative

How many valence electrons are used to form chemical bonds between sulfur and bromine in SBr2?

• 2

• 4

• 6

• 8

What is the total number of electrons around each bromine atom in the SBr2 molecule?

• 9

• 8

• 7

• 6