Question

Study the variation in the atomic radii of elements can below and arrange them in increasing order

Answer 1

Given :

Atomic radii of elements :

Na Li Rb Cs K

186 152 246 262 231

Increasing order :

Li     Na          K      Rb      Cs

152  186         231  246      262    

Smallest Atomic Radii ---Lithium

Largest Atomic radii -- Cesium

As we move down in a group, atomic radius increases.

Answer 2

The element having the smallest atom is lithium (Atomic radius is 52 pm) while the element . having the largest atom is caesium (Atomic radius is 262 pm).

The element having the smallest atom is lithium (Atomic radius is 52 pm) while the element . having the largest atom is caesium (Atomic radius is 262 pm).(ii) The atomic size increases while going down a group because new shells are being added at each step.

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