Isotopes Quiz 1

Question 1

Consider the following radioactive series of decays: $$ \ $$ $$R\xrightarrow{\alpha }X\xrightarrow{\beta }Y\xrightarrow{\beta }Z$$ $$ \ $$ Here, Z and R nuclei represent which of the following?

Accepted Answer

Isotopes

Answer

Isobars

Answer

Isomers

Answer

Isotones

Question 2

When an $$\alpha - $$particle is emitted from Uranium-238, it gets decayed into:

Accepted Answer

Thorium-234

Answer

Helium

Answer

Carbon

Answer

Uranium-235

Question 3

There is a radioactive element. The radioactive element is going to decay beta particles and gets stability. Then the atomic number of the nucleus __

Accepted Answer

Increases by one unit

Answer

Decreases by one unit

Answer

Remains unchanged

Answer

Increases by two unit

Question 4

Complete the following reaction:$$ {}_{3}L{{i}^{7}}+?	o {{2}_{2}}H{{e}^{4}}$$

Accepted Answer

$$_{1}{{H}^{1}}$$

Answer

$$_{1}{{H}^{2}}$$

Answer

$$_{1}{{H}^{3}}$$

Answer

$$_{4}B{{e}^{8}}$$

Question 5

A radioactive nucleus is given where mass number is $$A$$ and atomic number is $$Z$$, it undergoes the following reaction sequence: $$ \ {}_{Z}{{X}^{A}}{{\xrightarrow{3\alpha }}_{C}}{{Y}^{B}} \ $$ What is the mass ratio of $$B$$ and $$C$$?

Accepted Answer

$$\dfrac{A-12}{Z-6}$$

Answer

$$\dfrac{A-6}{Z-12}$$

Answer

1

Answer

None of these