Question

1pt which of the following groups of elements is ranked from most reactive to least reactive?

a. se, s, o, n

b. s, se, te, po

c. rn, xe, kr, ar

d. c, n, o, f

Explanation:

• For non - metals in the same group (Group 16 in this case), reactivity decreases down the group. Sulfur (\(S\)) is above selenium (\(Se\)), which is above tellurium (\(Te\)), and polonium (\(Po\)) is the bottom - most in the group among these.
• In option A, oxygen (\(O\)) is more reactive than sulfur (\(S\)) (as reactivity of non - metals in a group decreases down the group), so this order is wrong.
• In option C, noble gases (Rn, Xe, Kr, Ar) have very low reactivity and reactivity of noble gases generally decreases down the group (but they are all relatively inert), and the order given is incorrect as Ar is more stable (less reactive) than Kr, Xe, Rn.
• In option D, for non - metals in the same period, reactivity (non - metallic character) increases across the period. So \(F\) is more reactive than \(O\), \(O\) is more reactive than \(N\), and \(N\) is more reactive than \(C\). So this order is wrong.

Answer:

B. S, Se, Te, Po