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Q.

Statement 1 : The average mass of one Mg atom is 24.305 amu, which is not the actual mass of one Mg atom.Statement 2 : Three isotopes, 24 Mg, 25 Mg and 26 Mg, of Mg are found in nature.

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a

Both Statement 1 and Statement 2 are true

b

Statement 1 is true and Statement 2  is false

c

Statement 1 is false and Statement 2 is true.

d

Both Statement 1 and Statement 2 are false.

answer is A.

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Detailed Solution

Average atomic mass = %abundance of one isotope(its mass)+%abundance of second isotope(its mass)+....Sum of the percentages
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