Which element belongs to Group 1?
ARubidium
BStrontium
CBarium
DRadium
Answer & Solution
Correct answer: A. Rubidium
1. Group 1 runs lithium, sodium, potassium, rubidium, caesium, francium.
2. Strontium, barium and radium sit in Group 2.
3. So rubidium is the Group 1 member.
_Source: NCERT Class 11 Chemistry Part II, Unit 10, The s-Block Elements._
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