C2-7 Group 1 elements

What is the alternative name for group 1 elements?

• Halogens

• Chalcogens

• Alkali metals

• Inert gases

Which of these is NOT a property of the group 1 elements?

• Soft enough to cut with a knife

• Readily react with water

• Diatomic in nature

• Low density (less dense than water)

What is the correct trend for the reactivity of group 1 metals as you go down the group?

• Increases

• Decreases

• Stays the same

• No trend observed

What is the correct trend for the density of group 1 metals as you go down the group?

• Increases

• Decreases

• Stays the same

• No trend observed

What is the correct trend for the melting (and boiling) points of group 1 metals as you go down the group?

• Increases

• Decreases

• Stays the same

• No trend observed

Group 1 metals are very reactive.

Why is this?

• The are known as alkali metals

• They readily lose their outer electron

• They have a low density compared to water

• The atoms get bigger down the group

State symbols tell you the physics state of a substance in a chemical reaction. What state symbol would be needed for lithium in the reaction shown?

• (s)

• (l)

• (g)

• (aq)

State symbols tell you the physics state of a substance in a chemical reaction. What state symbol would be needed for hydrogen in the reaction shown?

• (s)

• (l)

• (g)

• (aq)

State symbols tell you the physics state of a substance in a chemical reaction. What state symbol would be needed for lithium hydroxide in the reaction shown?

• (s)

• (l)

• (g)

• (aq)

State symbols tell you the physics state of a substance in a chemical reaction. What state symbol would be needed for water in the reaction shown?

• (s)

• (l)

• (g)

• (aq)