MCQ
Kossel and Lewis approach was based on the :
- AReactivity of elements.
- ✓Inertness of noble gases.
- CReactivity of metals.
- DInertness of non-metals.
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$(I) 0.5\ mole$ of $O_3$ $(II) 0.5\ gm$ atom of oxygen $(III) 3.011 \times 10^{23}$ molecules of $O_2$ $(IV) 5.6\ litre$ of $CO_2$ at $STP$