There are two isotopes of an element with atomic mass$z$. Heavier one has atomic mass $z + 2$ and lighter one has z$- 1$, the abundance of lighter one is

Question

Dr. Abubacker · Accepted Answer

(a)
Let the percent abundance of lighter isotope is $x$.
$	herefore$ Atomic mass, $z = \frac{x(z - 1) + (100 - x)(z + 2)}{z + 100 - x}$
$3x = 200$ or $x = 66.6\%$

Q. There are two isotopes of an element with atomic mass$z$. Heavier one has atomic mass $z + 2$ and lighter one has z$- 1$, the abundance of lighter one is

Explanation

Reviewed by Dr. Abubacker

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