Chemistry-Atomic & Molecular Mass
NEET Chemistry Atomic & Molecular Mass Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 11
Assertion (A): The atomic mass of argon is approximately 40 g/mol. | Reason (R): Argon has isotopes with atomic masses of 36, 38, and 40, with the most abundant isotope being the one with an atomic mass of 40.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
The assertion and reason are both true. The atomic mass of argon is approximately 40 g/mol because the most abundant isotope is 40Ar, which constitutes 99.600% of natural argon.
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