Chemistry - Complete s-block Question with Solution | TestHub
ChemistryComplete s-blocks-block IAEasy2 minPYQ_2026
ChemistryEasysingle choice
Identify the alkali metal having the smallest atomic size from following.
Options:
Answer:
A
Solution:
The alkali metals given in the options belong to Group 1 of the periodic table.
As we move down a group, the number of electron shells increases, which leads to an increase in atomic size.
The order of the given alkali metals from top to bottom in Group 1 is Sodium (Na), Potassium (K), Rubidium (Rb), and Caesium (Cs).
Therefore, the order of their atomic sizes is Na < K < Rb < Cs.
Among the given options, Sodium has the smallest atomic size.
Answer: Sodium
Stream:MHT_CETSubject:ChemistryTopic:Complete s-blockSubtopic:s-block IA
⏱ 2mℹ️ Source: PYQ_2026
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