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Question

Which among the following is correctly represented?

A
126C
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B
816O
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C
1123Na
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D
1910F
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Solution

The correct option is A 126C
The symbolic representation of an element is as follows:
AZX, where A is mass number and Z is atomic number. The table given below shows the atomic numbers and mass numbers of elements:
ElementAtomic numberMass numberSymbolic representationOxygen816 168OSodium11232311NaFluorine919199FCarbon 612126CHence, only carbon atom is correctly represented.

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