Online Class 25/8/2024 Lewis Structures

ALUMINIUM has ___________ valence electrons

• 2

• 3

• 13

• 14

CHLORINE has _________ valence electrons.

• 7

• 17

• 8

• 5

XENON has _________ valence electrons.

• 18

• 8

• 17

• 7

Between C, H, O and N, which atom is more electropositive?

• C

• H

• O

• N

What is the total number of valence electrons in carbon dioxide (CO₂) molecules?

• 12

• 24

• 28

• 16

What is the total number of valence electrons in Ammonium ion (NH₄⁺).

• 9

• 8

• 10

• 12

Which element should be used as the central atom of a Lewis structure?

• The least electronegative element will be the central atom.

• The most electronegative will be the central atom.

• The largest atomic radius will be the central atom.

• The smallest atomic radius will be the central atom.

What is incorrect about the following Lewis structure for SO₃?

• Oxygen is not fulfilling the octet rule.

• Sulfur is not fulfilling the octet rule.

• All 24 valence electrons are not being used.

• There are too many valence electrons being used.

By replacing the element symbol, this could be a diagram of which element?

• Li

• Al

• C

• Be

This is a correct dot diagram for nitrogen (N)

• true
• false