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Average and Relative Atomic Mass

An element A ...

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An element A exist in two isotopic forms A15 and A16.if the average atomic mass of A was found to be 15.24.then find the % relative aboundance of A15 will be

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Q. If an element

X

exists in its two isotopic form

_{17}^{35} X (75 %)

_{17}^{37} X (25 %)

. The average atomic mass of element

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Q. Chlorine has two isotopes of atomic mass units 34.97 and 36.97. The relative abundance of an isotope is 0.755 and 0.245 respectively. Find the average atomic mass of chlorine.

Q. The relative abundance of two isotopes of atomic masses 85 and 87 are 75% and 25% respectively. The average atom mass of element is:

Relative abundance of isotopes of carbon are as follows:-

Isotopes	Relative abundance	Atomic Mass
C-12	$98.892$	12
C-13	$1.108$	13.00335
C-14	$2 \times 10^{- 10}$	14.00317

The average atomic mass of carbon will be:-

a_{1}, a_{2}, a_{3}, \dots, a_{15}

a_{1} + a_{2} + \dots + a_{10} = A

a_{6} + a_{7} + \dots + a_{15} = B

B - A = 200

B + A = 860,

a_{15}

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