Question

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Q.4. Question numbers 4(a)-4(d) are based on the variation in the atomic radii of first group
elements given below. Study and answer the questions that follow.
Group 1 Elements:
Na Li Rb
Cs K
Atomic radii (pm): 186
152 244 262 231
4(a) Arrange them in proper order as in the Periodic table of group 1. Name the elements
which have the smallest and the largest atoms.
4(b) Why is the size of the atom increases on going down in a group?
4(c) Which element of group 1 is most reactive and why?
4(d) Which element of group 1 is most metallic and why?
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Answer 1

Answer:

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Explanation:

mummy Bolte hai Subha Subha maths banta hai

Answer 2

Explanation:

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