alleryStart learning →Which element does NOT exist in nature?
ACarbon
BHydrogen
COxygen
DTechnetium
Answer & Solution
Correct answer: D. Technetium
1. Technetium (Z = 43) is the lightest element with no stable isotope.
2. It is highly radioactive.
3. It is artificially produced in nuclear reactors.
4. Carbon, hydrogen and oxygen are abundant in nature.
5. So technetium does not exist in nature.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
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