Lewis Structure and Valence Electrons

Dr. B. explains how to draw the Lewis structure for SnCl2. The tutorial begins with identifying the number of valence electrons for tin and chlorine, followed by calculating the total valence electrons. Tin, being less electronegative, is placed at the center, with chlorines on the sides. Electrons are distributed to form bonds and complete the structure. The tutorial concludes by checking formal charges to ensure the best Lewis structure is achieved.

What is the total number of valence electrons in SnCl2?

• 22

• 20

• 18

• 16

Which element is placed at the center of the SnCl2 Lewis structure?

• Hydrogen

• Tin

• Chlorine

• Oxygen

How many valence electrons does each chlorine atom have in the SnCl2 structure?

• 6

• 7

• 8

• 9

Why is it acceptable for tin to have only six valence electrons in SnCl2?

• Tin is below period 2

• Tin is in period 3

• Tin is in period 2

• Tin is in period 1

What is the formal charge on each atom in the SnCl2 Lewis structure?

• All atoms have a formal charge of 0

• All atoms have a formal charge of -1

• All atoms have a formal charge of +1

• Tin has a formal charge of +2