MCQ
Which of the following is not a chalcogen
- A$O$
- B$S$
- C$Se$
- ✓$Na$
✓
Answer
Correct option: D.
$Na$
d
(d) $16^{th}$ group called chalcogens (oxygen family) while $Na$ is a Ist group element which is called alkali metal.
(d) $16^{th}$ group called chalcogens (oxygen family) while $Na$ is a Ist group element which is called alkali metal.
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