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lina2011 [118]
3 years ago
12

B. the radioactive atom decays by alpha emission. write an equation showing the decay. (1 point)

Chemistry
1 answer:
zalisa [80]3 years ago
7 0

alpha decay is an emission of ₂⁴He nucleus. If an element undergoes an alpha decay, the mass of the daughter nucleus formed is reduced by 4 compared to mass of parent atom and atomic number is reduced by 2 compared to atomic number of parent atom.

Let's assume that the parent atom is X, atomic number is z and mass number is A. Then the formed daughter nucleus, Y should have atomic number as z-2 and mass number as A-4.

The equation is

(z) (A)X → ₂⁴α + (z-2)(A-4)Y


Example:

₉₄²³⁹Pu → ₂⁴α + ₉₂<span>²³⁵U</span>

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Answer:

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With the information above in mind, we <u>calculate how many moles are there in 32.0 L</u>:

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