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Predict by what mole (s) spontaneous rad...

Predict by what mole (s) spontaneous radioactive decay will proceed for each of the following unstable isotopes:

A

a. `._(2)He^(6)`

B

b `._(9)Fe^(18)`

C

c. `._(93)Np^(241)`

D

d. `._(91)Po^(235)`

Text Solution

Verified by Experts

a. `._(2)He^(6), p = 2, n = 4 implies (n)/(p) = (4)/(2) = 2` (high)
`:.beta`-decay
b. `_(9)Fe^(18), p = 9, n = 9 implies (n)/(p) = (9)/(9) = 1`
c. `._(93)Np^(241), p = 93, n = 148 implies (n)/(p) = (148)/(93) = 1.6` (high)
and `Z gt 82 implies alpha` or `beta` decay
d. `._(91)Po^(235), p = 91, n = 144 implies (n)/(p) = (144)/(91) = 1.58` (high)
`Z gt 82 implies alpha`- or `beta`- decay
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