Question

Self Evaluation 1. The elements A, B, C, D, E, F, G, H, I, J, K and L represent metals in the decreasing order of reactivity. Which one of them is most likely to
(a) occur as salt of fluorides and chlorides?
(b) occur as oxides and sulphides? ​

Answer 1

$\textrm {Part (a) :}$

$\textrm {To occur as a salt of fluorides or chlorides, the element needs to be highly} \\\textrm{reactive as fluorides and chlorides are very electronegative.}$

$\textrm {Therefore, element A is most likely to occur}\\\textrm {as a salt of fluorides and chlorides.}$

$\textrm {Part (b) :}$

$\textrm {To occur as oxides and sulphides, the element should be covalent}\\\textrm {or have the least reactivity (usuallly with elements of valency 4).}$

$\textrm {Therefore, element L is most likely to occur as oxides and sulphides.}$