Lesson Worksheet: Alkali Metals Chemistry • 7th Grade
In this worksheet, we will practice describing the compounds and reactivities of alkali metals and trends in their physical and chemical properties.
Q3:
In which of the alkali metals is the valence electron closest to the nucleus?
- ASodium
- BCesium
- CLithium
- DPotassium
- ERubidium
Q4:
The most stable isotope of the radioactive alkali metal francium has a half-life of only 22 minutes. If a sample of francium were large enough to react visibly with water, would the reaction be more or less vigorous than the reaction between cesium and water?
- ALess vigorous
- BMore vigorous
- CSimilarly vigorous
Q5:
Which of the following statements is false?
- AAlkali metals have lower boiling points than iron.
- BAlkali metals are softer than iron.
- CAlkali metals are denser than iron.
- DAlkali metals are more reactive than iron.
- EAlkali metals have lower melting points than iron.
Q6:
Which of the following is not a property of alkali metals?
- AThey react with oxygen to produce oxides, peroxides, and superoxides.
- BThey are otherwise known as group 1 metals.
- CThey have low densities relative to most other metals.
- DThey have two s electrons in their outer shell.
- EThey react with water to produce hydroxides and hydrogen.
Q7:
What gas is formed when an alkali metal reacts with water?
- ACarbon dioxide
- BHydrogen
- CNitrogen
- DMethane
- EOxygen
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