Atomic Radii and Ionization Energy (Group 1)

Q.

The elements of the third period of the Periodic Table are given below:

Which atom is bigger, Na or Mg? Why?

Q.

Question 23
Which one of the following depicts the correct representation of atomic radius(r) of an atom?



(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Q.

The ionic radii of ${\mathrm{O}}^{2-}$, ${\mathrm{F}}^{-}$, ${\mathrm{Na}}^{+}$ and ${\mathrm{Mg}}^{2+}$are in the order:

1. ${\mathrm{F}}^{-}>{\mathrm{O}}^{2-}>{\mathrm{Na}}^{+}>{\mathrm{Mg}}^{2+}$

2. ${\mathrm{Mg}}^{2+}>{\mathrm{Na}}^{+}>{\mathrm{F}}^{-}>{\mathrm{O}}^{2-}$

3. ${\mathrm{O}}^{2-}>{\mathrm{F}}^{-}>{\mathrm{Na}}^{+}>{\mathrm{Mg}}^{2+}$

4. ${\mathrm{O}}^{2-}>{\mathrm{F}}^{-}>{\mathrm{Mg}}^{2+}>{\mathrm{Na}}^{+}$

Q. Why $5d$ transition series elements have higher ionization enthalpies than $4d$ transition series elements ?

Q.

Which of the following is the correct order of the atomic size of C, N, P and S?

1. 

2. 

3. 

4. 

Q.

What happens to the atomic radii of the group IA elements as we go down the group.

1. Increases

2. decrease

3. remains constant

4. None of these

Q. The atomic radii of the group IA element's decreases as we go down the group.

1. True

2. False

Q.

Size of the nucleus is:

1. 1.75 $\times$ ${10}^{-15}$ m

2. 10 cm

3. 2 $\times$ ${10}^{-15}$ m

4. 1.75 $\times$ ${10}^{-15}$ cm