In a nuclear reaction given below, a nucleus X 226 88 changes to another nucleus Y . X 226 88 → Y + α + Energy What is atomic number and mass number of Y ?

Since the given radioactive decay is that of alpha decay as there is an alpha particle emitted, therefore, the equation can be rewritten as, X 226 88 → Y 222 86 + α 2 4 + Energy ∴ Atomic number of Y is 86 Mass number of Y is 222 . Atomic number is the number of protons present in the nucleus of that atom. Mass number is the number of nucleons present in the nucleus of that atom.

How many alpha and beta particles are emitted when uranium nucleus U 238 92 decays to lead Pb 206 82 ?

During α decay, Mass number decrease by 4 and Atomic number decrease by 2 . During β decay, Atomic number increase by 1 . Let x is number of α decays and y is number of β decays. 206 = 238 - 4 x _ _ _ _ _ _ _ ( 1 ) 82 = 92 - 2 x + y _ _ _ _ _ _ _ _ ( 2 ) 4 x = 32 x = 8 Putting value of x in ( 2 ) 82 = 92 - 2 × 8 + y y = 82 + 16 - 92 y = 6 Number of α particle = 8 . Number of β particles = 6 .

E M B I B E

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 6 - Nuclear Physics>Exercise>Q 23

MEDIUM

10th Tamil Nadu Board

IMPORTANT

Earn 100

Describe the use of radioactivity in archaeological research.

Important Questions on Nuclear Physics

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 6 - Nuclear Physics>Exercise>Q 24

Name the isotope used in the study of circulation of blood.

MEDIUM

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 6 - Nuclear Physics>Exercise>Q 25

Give any two uses of radio isotopes in the field of agriculture?

MEDIUM

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 6 - Nuclear Physics>Exercise>Q 26

Give scientific explanation:

When the radiation coming out from certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 6 - Nuclear Physics>Exercise>Q 27

In a nuclear reaction given below, a nucleus ${}_{88}X^{226}$ changes to another nucleus $Y$ .

${}_{88}X^{226} \to Y + α + Energy$

What is atomic number and mass number of $Y$ ?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 6 - Nuclear Physics>Exercise>Q 28

How many alpha and beta particles are emitted when Uranium nucleus