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CBSE Class 10 Science 2020 Outside Delhi Set 1

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Question : 2 of 30
Marks: +1, -0
Define electro positivity.
OR
The atomic radii of first group elements are given below :
Group-I element Atomic Radii (pm)
Na\mathrm{Na} 86
K\mathrm{K} 231
Rb\mathrm{Rb} 244
Cs\mathrm{Cs} 282
Solution:  
State the reason behind the observed trend in the above elements.
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