Podcast
Questions and Answers
Which property of alkali metals makes them highly reactive?
Which property of alkali metals makes them highly reactive?
- Large size and low ionization enthalpy
- Small size and low ionization enthalpy (correct)
- Small size and high ionization enthalpy
- Large size and high ionization enthalpy
Why do the alkali metals tarnish in dry air?
Why do the alkali metals tarnish in dry air?
- Formation of superoxides
- Formation of hydroxides
- Reaction with nitrogen
- Formation of oxides (correct)
Which alkali metal forms a peroxide when reacting with oxygen?
Which alkali metal forms a peroxide when reacting with oxygen?
- Lithium
- Rubidium
- Sodium (correct)
- Potassium
What is the trend in hydration enthalpies of alkali metal ions as you move down the group?
What is the trend in hydration enthalpies of alkali metal ions as you move down the group?
Which alkali metal has the lightest density?
Which alkali metal has the lightest density?
What characteristic property allows caesium and potassium to be used as electrodes in photoelectric cells?
What characteristic property allows caesium and potassium to be used as electrodes in photoelectric cells?
Which element shows similarities to magnesium in its properties?
Which element shows similarities to magnesium in its properties?
What is the common valence electron configuration for all alkali metals?
What is the common valence electron configuration for all alkali metals?
Why are alkali metals considered the most electropositive metals?
Why are alkali metals considered the most electropositive metals?
What is responsible for the regular trends in physical and chemical properties of alkali metals?
What is responsible for the regular trends in physical and chemical properties of alkali metals?
Why are alkali metals never found in free state in nature?
Why are alkali metals never found in free state in nature?
What property of alkali metal atoms increases with atomic number in a period?
What property of alkali metal atoms increases with atomic number in a period?
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