Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 22

MEDIUM

NEET

IMPORTANT

Earn 100

${}^{40}K$ isotope of potassium has a half life of $1.37 \times 10^{9}$ years and decays to an isotope of argon which is stable. In a particular sample of moon rock, the ratio of potassium atoms to argon atoms was found to be $1 : 7 .$ The age of the rock, assuming that originally there was no argon present, is

50% studentsanswered this correctly

Important Questions on Nuclei

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 25

A freshly prepared radioactive source of half-life $2 h$ , emits radiation of intensity which is $64$ times the permissible safe level. The minimum time after which it would be possible to work safely with this source is

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 27

Half life of radioactive element depends upon

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 29

Out of the following, which one is not emitted by a natural radioactive substance?

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 31

In the equation

{}_{13}^{27}{Al} + {}_{2}^{4}{He} ⟶ {}_{15}^{30}P + X,

The correct symbol for

X

is

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 32

Nuclear energy is released in fission, since, binding energy per nucleon is

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 33

In nuclear reactions we have the conservation of

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 34

γ

-decay occurs when

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 37

1 g

of hydrogen is converted into

0.993 g

of helium in a thermonuclear reaction. The energy released is