Question

What are the periodic trends in atomic radius? Select all that are correct. Choose one or more: Atomic radius decreases across a period as effective nuclear charge increases. Atomic radius increases across a period because atomic number increases. Atomic radius increases from top to bottom within a group as the n value of the valence electrons increases. Atomic radius decreases from top to bottom within a group as the n value of the valence electrons increases.

Answer 1

Question 1:

The correct answers are Option A (Atomic radius decreases across the period as effective nuclear charge increases) and Option C ( Atomic radius increases because of addition of new shells, because if you down the group, you will add another valence shell, which will further increase the radius)

Right answers are A and C

Question 2:

= Ruinen

So, the lambda increases with the decrease in the value of (1/n1^2 - 1/n2^2). The value will be lower for higher value pair for n1 and n2

So for highest pair (n=11 to n=13), the lambda will be highest, which means frequency will be lowest for this pair.

So, the highest frequency transition will be observed for n=4 to n=6 (Option A)

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