Iodine and Its Chemical Properties

Dr. B explains how to draw the Lewis structure for Iodine gas (I2), a purple gas. Iodine, in group 7 of the periodic table, has 7 valence electrons. With two Iodine atoms, there are 14 valence electrons in total. These electrons are distributed to form a chemical bond and fulfill the octet rule for each atom. The Lewis structure is drawn by placing two electrons between the atoms to form a bond, ensuring each Iodine has eight electrons. The structure can also be represented as a structural formula, where the bond is shown as a single line, indicating two bonding electrons.

What group is iodine in on the periodic table?

• Group 6

• Group 8

• Group 5

• Group 7

How many valence electrons does a single iodine atom have?

• 8

• 5

• 6

• 7

What is the total number of valence electrons for two iodine atoms?

• 10

• 12

• 14

• 16

How many electrons are used to form the chemical bond between the two iodine atoms?

• 1

• 4

• 2

• 3

What does the single line in the structural formula of iodine gas represent?

• One valence electron

• Two valence electrons

• Three valence electrons

• Four valence electrons

What is the purpose of fulfilling the octet rule in the Lewis structure?

• To ensure each atom has 6 electrons

• To ensure each atom has 12 electrons

• To ensure each atom has 8 electrons

• To ensure each atom has 10 electrons