MCQ practice · SSC Chemistry Board questions · Chapter 3: Structure of Matter
Of all the elements discovered up to 2016, how many are made in the laboratory?
Think it through first, then pick an option.
- a 14
- b 20
- c 26
- d 98
Answer and explanation
Correct answer: b 20
20: of the 118 elements found up to 2016, 98 occur in nature (board count), so 118 − 98 = 20 are made in the laboratory.
Why the other options are wrong
- a 14: 14 does not come out of any count here; 118 − 98 = 20.
- c 26: 26 is the number of elements in the human body, not those made in the laboratory.
- d 98: 98 is the number found in nature; to get the laboratory-made ones, subtract it from 118.
More board questions on this topic
- Which is a compound?
- What is the name of the smallest particle of an element?
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- How many elements are present in the human body?
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