What happens to the mass number of an element when a -particle- is emitted-

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Byju's Answer

Standard IX

Chemistry

Uses of Radioactive Substances

What happens ...

Question

What happens to the mass number of an element when a $β$ -particle, is emitted?

It decreases by

1

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It remains the same

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It increases by

1

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It increases by

2

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Solution

The correct option is B It remains the same
As the $β$ -particle emission converts either proton to neutron( $β^{+}$ decay) or neutron to proton( $β^{-}$ decay), the total number of nucleons (no. of protons+no. of neutrons) remains same, i.e., mass number remains the same.

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Similar questions

Q. What happens to the mass number of an element when it emits a

β

-particle

Q. STATEMENT - 1 :

_{Z} X^{A}

undergoes 2

α

decays, 2

β

decays (negative

β

) and 2 decays. As a result the daughter product is

_{Z - 2} Y^{A - 8} .

STATEMENT -2 : In

α

decay the mass number decreases by 4 unit and atomic number decreases by 2 unit. In

β

decay (negative

β

) the mass number remains unchanged and atomic number increases by 1 unit. In

γ

decay, mass number and atomic number remains unchanged.

Q. The following data is for class of 5 people and their weights:
24, 26, 25, 30, 35
What happens to the average when the boy who weighs 24 kg leaves the class?

Q. Assertion :

_{Z} X^{4}

undergoes

2 α - d e c a y s, 2 β - d e c a y s

(negative

β

), and

2 γ - d e c a y s

. As a result, the daughter product is

_{z - 2} Y^{A - B}

Reason: In

α - d e c a y

, the mass number decreases by 4 unit and atomic number decreases by 2 unit. In

β - d e c a y

(negative

β

), the mass number remains unchanged and atomic number increases by 1 unit. In

γ - d e c a y

, mass number and atomic number remain unchanged.

Q. An emission of

β - p a r t i c l e

increases the atomic number of parent element by :

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What happens to the mass number of an element when a β-particle, is emitted?

The correct option is B It remains the sameAs the β-particle emission converts either proton to neutron(β+ decay) or neutron to proton(β− decay), the total number of nucleons (no. of protons+no. of neutrons) remains same, i.e., mass number remains the same.

What happens to the mass number of an element when a $β$ -particle, is emitted?

The correct option is B It remains the same
As the $β$ -particle emission converts either proton to neutron( $β^{+}$ decay) or neutron to proton( $β^{-}$ decay), the total number of nucleons (no. of protons+no. of neutrons) remains same, i.e., mass number remains the same.