The atomic mass of Th is 232-18 and its atomic number is 90- In terms of its radioactive disintegration- 6 - and 4 - particles are emitted- The mass number and atomic number of products is -

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Standard XII

Chemistry

Introduction to Atomic Structure

The atomic ma...

Question

The atomic mass of Th is 232.18 and its atomic number is 90. In terms of its radioactive disintegration, 6 $α$ - and 4 $β$ - particles are emitted. The mass number and atomic number of products is :

208, 82

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192 78

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212, 86

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180, 72

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Solution

The correct option is B 208, 82
Atomic mass of Th = 232.18
$∴$ Mass number of Th = 232
$_{92} T h^{232} \to_{A} X + 6_{2} H e^{4} + 4_{- 1} e^{0}$

232 = m + 24 + 4 $\times$ 0
m = 208
90 = A + 2 $\times$ 6 + 4(-1) $\Rightarrow$ A = 82
X has atomic number = 82
Mass number = 208

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The atomic mass of Th is 232.18 and its atomic number is 90. In terms of its radioactive disintegration, 6 α- and 4 β- particles are emitted. The mass number and atomic number of products is :

The correct option is B 208, 82Atomic mass of Th = 232.18∴ Mass number of Th = 23292Th232→AX+62He4+4−1e0232 = m + 24 + 4 × 0m = 20890 = A + 2 × 6 + 4(-1) ⇒ A = 82X has atomic number = 82Mass number = 208

The atomic mass of Th is 232.18 and its atomic number is 90. In terms of its radioactive disintegration, 6 $α$ - and 4 $β$ - particles are emitted. The mass number and atomic number of products is :

The correct option is B 208, 82
Atomic mass of Th = 232.18
$∴$ Mass number of Th = 232
$_{92} T h^{232} \to_{A} X + 6_{2} H e^{4} + 4_{- 1} e^{0}$

232 = m + 24 + 4 $\times$ 0
m = 208
90 = A + 2 $\times$ 6 + 4(-1) $\Rightarrow$ A = 82
X has atomic number = 82
Mass number = 208