Question

The set of elements that differ in a mutual relationship from those of the other sets is

• A. $\mathrm{Be}-\mathrm{Al}$
• B. $\mathrm{Li}-\mathrm{Na}$
• C. $\mathrm{B}-\mathrm{Si}$
• D. $\mathrm{Li}-\mathrm{Mg}$

Answer 1

The correct option is B

$\mathrm{Li}-\mathrm{Na}$

The explanation for the correct option:

B: $\mathrm{Li}-\mathrm{Na}$

• Certain pairings of diagonally adjacent elements in the second and third periods (first 20 elements) of the periodic table are considered to have a diagonal relationship.
• In s-block elements, there is a diagonal relationship between neighbouring elements that are situated in the second and third periods of the periodic table. In contrast to the other elements in the subgroup to which they belong,
• s-block elements have drastically different properties.
• There are several commonalities between the diagonal neighbours. Moving from left to right and down the group reveals this relationship; the periodic table has opposing elements.
• The varied ways that certain atomic characteristics fluctuate down groups and across periods of the Periodic Table result in diagonal relationships.
• These combinations Lithium $\left(\mathrm{Li}\right)$, Magnesium $\left(\mathrm{Mg}\right)$, Beryllium $\left(\mathrm{Be}\right)$ and Aluminium $\left(\mathrm{Al}\right)$, Boron$\left(\mathrm{B}\right)$ and Silicon $\left(\mathrm{Si}\right)$.

Final Answer: Therefore, Option B is the correct option.