Properties and Reactions of Sodium

The video explores how sodium reacts when exposed to air. Initially, sodium appears white and shiny, but it quickly tarnishes due to reactions with oxygen and possibly water vapor in the air. Unlike lithium, sodium does not react with nitrogen. The reaction results in the formation of sodium oxides.

What is the initial appearance of sodium when it is first observed?

• Rusty and red

• Dull and grey

• Shiny and metallic

• Black and powdery

How does the ease of cutting sodium compare to lithium?

• Sodium cannot be cut at all

• Sodium and lithium are equally hard to cut

• Sodium is harder to cut than lithium

• Sodium is easier to cut than lithium

What happens to the shiny appearance of sodium after it is cut?

• It remains shiny indefinitely

• It starts to tarnish and become dull

• It becomes even shinier

• It changes color to blue

Which gas does sodium NOT react with in the air?

• Water vapor

• Oxygen

• Nitrogen

• Carbon dioxide

What compound is formed when sodium reacts with oxygen and water vapor?

• Sodium nitrate

• Sodium sulfate

• Sodium chloride

• Sodium oxide