The emission of two successive beta particles from the nucleus ³2}₁5}{P} will produce

Correct Answer is : 1732³2}₁7}1732Cl

Correct Answer is : 1732³2}₁7}1732Cl

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JAMB Chemistry 2019 Paper

Question : 69

Total: 80

^{32}_{15}\mathrm{P}

will produce

Solution:

Concept:

Each beta particle increases the atomic number by 1 while the mass number remains unchanged.

Explanation:

A beta particle is an electron, written as

^{0}_{-1}e

One beta emission changes

^{32}_{15}\mathrm{P}

into

^{32}_{16}\mathrm{S}

A second beta emission raises the atomic number again by 1.

Thus, the final nucleus has mass number 32 and atomic number 17.

Using the nuclear equation:

{}^{32}_{15}\mathrm{P} \to 2\,{}^{0}_{-1}e + \,{}^{A}_{Z}\mathrm{X}

Conserving mass number:

32 = 2(0) + A

, so

A = 32

Conserving atomic number:

15 = 2(-1) + Z

, so

Z = 17

Therefore, the product is

^{32}_{17}\mathrm{Cl}

Answer:

^{32}_{17}\mathrm{Cl}

(Option C).

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