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Questions

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5 questions · timed · auto-graded

Question 11 Mark

The atoms of different elements which bave the ___________[different/same] mass number, but ___________ [different / same] atomic number, are called isobars.

Answer

same, different.

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Question 21 Mark

The temperature required for the process of nuclear fusion is nearly ___________ $\left[10^5 K / 10^7 K / 10^{10} K\right]$.

Answer

$10^7 K$

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Question 31 Mark

The atomic number and mass number of radioactive element are not changed when it emits ___________ [a-particle / $\beta$-particle / $\gamma$-radiations].

Answer

$\gamma$-radiation

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Question 41 Mark

The atomic number of a radioactive element is not changed when it emits ___________ [ $\alpha$-particle / $\beta$-particle / $\gamma$-radiation],X

Answer

$\gamma$-radlation

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Question 51 Mark

During the emission of a/an ___________ [ $\alpha$-particle / $\beta$-particle / $\gamma$-radiation] only the mass number remains same.

Answer

$\beta$-particle