A certain radioisotope of $ {}^{235}_{92}\mathrm{U} $ emits four alpha particles and three beta particles. The mass number and the atomic number of the re...

Assessment: JAMB UTME - Physics - 1994 Subject: Physics

Question 1 Report

A certain radioisotope of $ {}^{235}_{92}\mathrm{U} $ emits four alpha particles and three beta particles. The mass number and the atomic number of the resulting elements respectively are

219 and 87

84 and 223

223 and 87

219 and 81

Answer Details

$_{92}^{235} U$ $\to$ 4 $(_{2}^{4} α)$ + 3 $(_{- 1}^{0} e)$ + $_{a}^{b} y$

a + (4 + 2) + (3x - 1) = 92 $\Rightarrow$ a = 87

b + (4 x 4) + (3 x 0) = 235 $\Rightarrow$ b = 219

$_{a}^{b} Y$ = $_{87}^{219} Y$

Read lesson note on Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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A certain radioisotope of \( {}^{235}_{92}\mathrm{U} \) emits four alpha particles and three beta particles. The mass number and the atomic number of the re...

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A certain radioisotope of \( {}^{235}_{92}\mathrm{U} \) emits four alpha particles and three beta particles. The mass number and the atomic number of the re...

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