During -decay- the mass of atomic nucleus -

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Standard XII

Physics

Alpha Decay

During β-de...

Question

During $β$ ^-decay, the mass of atomic nucleus :

decreases by 1 unit

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increases by 1 unit

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decreases by 2 units

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remains unaffected

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Solution

The correct option is D remains unaffected
$β$ -decay or $_{- 1} e^{0}$ decay leads to no change in mass number as $β$ -particle has zero mass.

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Similar questions

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. Assertion :

{_{z} X}^{A}

undergoes

2

α

- decays,

2

β

- decays (negative

β

) and

2

γ

-decays. As a result , the daughter product is

{_{z - 2} Y}^{A - 8}

Reason: 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 increaess by

1

unit. In

γ

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_{Z} X^{4}

undergoes

2 α - d e c a y s, 2 β - d e c a y s

(negative

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

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α - d e c a y

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

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Q. A nucleus of stable phosphorus has 15 protons and 16 neutrons. What will be the atomic number and mass number of new nucleus formed by decay of a

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During β^-decay, the mass of atomic nucleus :

The correct option is D remains unaffectedβ-decay or −1e0 decay leads to no change in mass number as β-particle has zero mass.

During $β$ ^-decay, the mass of atomic nucleus :

The correct option is D remains unaffected
$β$ -decay or $_{- 1} e^{0}$ decay leads to no change in mass number as $β$ -particle has zero mass.