Valence Electrons in Chlorine Gas

Dr. B explains how to draw the Lewis structure for Chlorine gas (Cl2). He starts by identifying the number of valence electrons for Chlorine, which is in group 7 or 17 of the periodic table, giving it 7 valence electrons. Since there are two Chlorine atoms, the total is 14 valence electrons. He demonstrates how to distribute these electrons to form a chemical bond and satisfy the octet rule for each atom. The video also covers how to represent the structure as a structural formula, using a single line to indicate a pair of bonded electrons. The tutorial concludes with a verification of the octet rule and a brief summary.

What is the total number of valence electrons in a molecule of Chlorine gas (Cl2)?

• 7

• 14

• 21

• 28

What is the appearance of Chlorine gas?

• Green

• Blue

• Colorless

• Red

How many valence electrons are placed between the two Chlorine atoms to form a bond?

• 1

• 2

• 4

• 3

What is the goal when distributing valence electrons around the Chlorine atoms?

• To give each atom 9 electrons

• To give each atom 7 electrons

• To give each atom 8 electrons

• To give each atom 6 electrons

How many valence electrons are used up in the Lewis structure of Cl2?

• 10

• 12

• 16

• 14

What is the significance of achieving an octet in the Lewis structure?

• It ensures the atoms are stable

• It ensures the atoms are reactive

• It ensures the atoms are unstable

• It ensures the atoms are ionized

What does the single line in the structural formula of Cl2 represent?

• A single valence electron

• A pair of valence electrons

• A triple bond

• An unpaired electron