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C, X, Z, B and D are the elements belonging to 16th group of Modern periodic table. The correct trend of atomic radius in these elements is C < X < Z < B < D. The element ‘C’ in the sequence is

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a
S
b
Te
c
Se
d
O

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detailed solution

Correct option is D

Atomic radius… O<S<Se<Te<Po ;

Ionization enthalpyO>S>Se>Te>Po ;

Melting pointO<S<Se<Po<Te ;

Boiling point….O<S<Se<Po<Te ;

Density……….O<S<Se<Te<Po ;

Electronegativity……O>S>Se>Te>Po ;

Electron gain enthalpy …. S>Se>Te>Po>O ;

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