A) S
B) Po
C) Se
D) Te
Correct Answer: B
Solution :
The metallic character increases down the group. In the 16 group element oxygen and sulphur are non-metals, Se and Te are metalloids and Po is a metal. Polonium is a radioactive element. It is discovered by Madam Curie from pitch blende. Oxygen \[({{O}_{2}})\] sulphur \[({{S}_{8}})\] and selenium \[(S{{e}_{8}})\] are polyatomic molecules but tellurium (Te) and polonium are monoatomic. There are two crystalline form of polonium. Polonium shows only +2 and+4 oxidation state but not show +6 due to inert pair effect.
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