3 years ago

If an isotope decay by process of beta emission

1 answer:

7 0

Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation. You need to know the effect of alpha and beta decay on the nucleus. The nucleus of an atom can be represented as: ... A = atomic mass (number of protons + neutrons)

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The two naturally occurring isotopes of antimony, 121Sb (57.21 percent) and 123Sb (42.79 percent), have masses of 120.904 and 12

Alex

Answer:

The correct answer is option c.

Explanation:

Formula used to determine an average atomic mass :

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Mass of isotope Sb-121 = 120.904 amu

Fractional abundance of Sb-121 = 57.21% = 0.5721

Mass of isotope Sb-123 = 122.904 amu

Fractional abundance of Sb-123 = 42.79% = 0.4279

Average atomic mass of Sb:

$120.904 amu\times 0.5721+ 122.904 amu\times 0.4279=121.7598 amu \approx 121.76 amu$

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20 Points!! Need it as soon as possible.

Solnce55 [7]

Answer:

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