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The s-Block Elements
Question
What are s-block elements?
Solution
The elements which belong to groups 1 and 2 of the periodic table are called s-block elements.
Question
Why are alkali metals not found in nature?
Solution
Alkali metal has one electron each in the valence subshell of their atoms. Since they have only one electron in valence subshell, therefore, they lose easily, owing to their low ionisation energies. Therefore, alkali metals are highly reactive chemically and do not exist in the free or native state.
Question
Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?
Solution
It is due to similarity in their:
(i) charge/size ratio.
(ii) ionic sizes.
Question
What is the nature of lithium compounds?
Solution
These are generally covalent.
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Mock Test Series
Mock Test Series