Symbol of nucleus with atomic number 18 and mass number 40 is written

1.	Symbol of nucleus with atomic number 18 and mass number 40 is written as:
A.	\[_{18}^{40}R\]
B.	\[_{18}^{40}Ar\]
C.	\[_{40}^{18}Ar\]
D.	40 Ar 18
E.	None of these
Answer» C. \[_{40}^{18}Ar\]

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Symbol of nucleus with atomic number 18 and mass number 40 is written as:

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