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Question

The properties that have increasing values with an increase in atomic number for the elements of 1A are:
I. Ionization energy (potential)
II. Atomic radius
III. Atomic mass

A
I only
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B
III only
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C
I and II only
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D
II and III only
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E
I, II, and III
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Solution

The correct option is D II and III only
In elements of IA as we move down, the number of orbit increases, ie. in each step electrons added in the new orbit, hence atomic radius and atomic mass both increase.

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