Variation of Atomic Size

Q. Assertion :Atomic size of group $18$ elements is more than the atomic size of group $17$ [$VII$ $A$] elements. Reason: Group $18$ elements has a complete octet.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Identify the correct option regarding the trend in atomic size down the group of the periodic table.

1. Atomic size increases down the group.
2. Atomic size decreases down the group.
3. Atomic size remains same down the group.
4. Atomic size first increases and then decreases down the group

Q.

Between the elements - N, O, P and S; the one with the maximum atomic radius is:

1. N

2. O

3. P

4. S

Q.

Which of the following order is correct with respect to the radius of the given species?

1. 
   

2. 

3. 

4. 

Q. Identify the set of elements that will form Dobereiner triad.

1. Helium, hydrogen, potassium
2. Nitrogen, phosphorus, arsenic
3. Lithium, sodium, potassium
4. Helium, neon, argon

Q.

Order of atomic radii of Ti, Zr, Hf is:

1. Ti > Zr > Hf
2. Ti < Zr < Hf
3. Ti < Zr = Hf
4. Ti = Zr = Hf

Q. From among the elements, choose the following:
Cl, Br, F, O, Al, C, Li, Cs and Xe
The element which has the smallest radius.