MCQ
An atom is:
- AThe smallest particle of matter known
- BThe smallest particle of a gas
- CThe smallest indivisible particle of an element that can take part in a chemical change
- DRadioactive emission
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S.No | Column I | Column II | |
a | 9.033 × 1024 atoms | i | 46g of He |
b | 2 moles of Na | ii | 15 moles |
c | 11.2 L of O2, at STP | iii | 3.011 × 1023 molecules |
d | 22g of CO2 | iv | 16g |