MCQ
Which among the following elements has the largest atomic radii?
- ANa.
- BMg.
- ✓K.
- DCa.
✓
Answer
Correct option: C.
K.
Na and K belong to the same group. i.e. Group I. Ca and Mg belong to the Group II. The atomic radius decreases in moving from left to right along a period. This is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom. Hence K has largest atomic radii.
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