Understanding Group 18 Elements

What is another name for Group 18 elements?

• Transition metals

• Halogens

• Noble gases

• Alkali metals

Which of the following is NOT a physical property of Group 18 elements?

• They are colorless at room temperature.

• They have high melting points.

• They are non-metallic.

• They are gases at room temperature.

Why are Group 18 elements chemically stable?

• They have incomplete valence shells.

• They are metallic.

• They have full valence shells.

• They have high reactivity.

What happens to the melting and boiling points of Group 18 elements as you move down the group?

• They fluctuate randomly.

• They increase.

• They remain constant.

• They decrease.

Why do noble gases have low melting and boiling points?

• They are metallic.

• They are diatomic molecules.

• They have strong van der Waals forces.

• They are monoatomic with weak van der Waals forces.

What is the nature of the force between particles in noble gases?

• Van der Waals forces

• Covalent bonds

• Metallic bonds

• Ionic bonds

How does the density of Group 18 elements change down the group?

• It increases.

• It remains the same.

• It decreases.

• It fluctuates.

What is the reason for the increase in density of Group 18 elements down the group?

• The volume increases faster than the mass.

• The mass increases faster than the volume.

• Both mass and volume decrease.

• Both mass and volume remain constant.

Why are noble gases non-reactive?

• They are metallic.

• They have full valence shells.

• They have high reactivity.

• They have incomplete valence shells.

What term is used to describe the electron arrangement of noble gases?

• Ionic

• Diatomic

• Octet

• Covalent