Valence Electrons in Polyatomic Ions

The video tutorial extends the discussion of Lewis dot structures to polyatomic ions, focusing on nitrate and sulfate ions. It explains how to account for charges in these ions and provides step-by-step instructions for drawing their Lewis dot structures. The tutorial emphasizes the importance of valence electrons and the use of square brackets to indicate ion charges.

What type of bond is formed between non-metal atoms in polyatomic ions?

• Metallic bond

• Hydrogen bond

• Covalent bond

• Ionic bond

How many valence electrons does a single nitrogen atom contribute in the nitrate ion?

• 9

• 7

• 5

• 3

What is the total number of valence electrons used in the Lewis dot structure of the nitrate ion?

• 25

• 24

• 23

• 22

How many valence electrons are left after forming single bonds in the nitrate ion structure?

• 20

• 18

• 16

• 12

What is the purpose of placing the Lewis dot structure of a polyatomic ion in square brackets?

• To highlight the central atom

• To denote the charge of the ion

• To indicate the number of atoms

• To show the molecular weight

What is the charge of the sulfate ion?

• 1-

• 2-

• 3-

• 4-

How many oxygen atoms are present in the sulfate ion?

• 2

• 4

• 3

• 5

How many valence electrons are contributed by the sulfur atom in the sulfate ion?

• 4

• 7

• 5

• 6

What is the total number of valence electrons in the sulfate ion structure?

• 30

• 28

• 34

• 32

What is the minimum number of bonds required to hold the sulfate ion structure together?

• 2

• 8

• 4

• 6