Embibe Experts Solutions for Exercise 1: SAT 2019

Manya, Kartik, Gurnoor and Sheena had arranged the ions ${\mathrm{F}}^{-}, {\mathrm{Na}}^{+}, {\mathrm{O}}^{2-}$ and ${\mathrm{Mg}}^{2+}$ in decreasing orders of their ionic radii.

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

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

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

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

Who had provided the correct order of their decreasing ionic radii? 

Consider the elements A, B, C and D with atomic numbers $11, 12, 16$ and $17$, respectively. Which among the following statements regarding these elements are correct?
 I. The element C will gain electron more easily than element D
 II. The element B tends to lose electron more readily than C
 III. The oxide of A will be least basic while that of D will be most basic
 IV. The energy required to remove an electron from outermost shell from A will be minimum while that from D will be maximum.

Select the correct set of statements regarding change in properties, as we move down the second group in periodic table.
 I. Atomic size increases
 II. Electronegativity increases
 III. Tendency to loose electrons increases
 IV. Valency remains same

Consider the following statements:
I. $\mathrm{F}, \mathrm{Cl}, \mathrm{N}$ and $\mathrm{O}$ are electronegative elements.
II. Electrons in the atoms given in statement I are in K and L shell only.
III. Tendency of forming cations decreases in second period of periodic table upto $\mathrm{F}$.
 Correct statement(s) is/are:

A part of the modern periodic table is shown below in which elements have been represented by English letters of the alphabets.

On the basis of the above periodic table, which one of the following statements is incorrect?

Identify the correct order of atomic radii of the following elements: