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Standard X

Physics

Alpha Decay

In which of t...

Question

In which of the following decays the atomic number decreases?

α

- decay

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β^{+}

-decay

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b e t a^{-}

-decay

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γ

-decay

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Solution

The correct options are
A $β^{+}$ -decay
C $α$ - decay
in $α$ decay atomic number decreases by two and in $β^{+}$ the weak interaction converts an atomic nucleus into a nucleus with atomic number decreased by one, while emitting a positron.

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Similar questions

Q. In which of the following decays the atomic number decreases?
(a) α-decay
(b) β⁺-decay
(c) β⁻-decay
(d) γ-decay

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

-decay, mass number and atomic number remain unchanged

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. In which of the following decays the element does not change?
(a) α-decay
(b) β⁺-decay
(c) β⁻-decay
(d) γ-decay

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In which of the following decays the atomic number decreases?

The correct options are A β+-decay C α- decayin α decay atomic number decreases by two and in β+ the weak interaction converts an atomic nucleus into a nucleus with atomic number decreased by one, while emitting a positron.

The correct options are
A $β^{+}$ -decay
C $α$ - decay
in $α$ decay atomic number decreases by two and in $β^{+}$ the weak interaction converts an atomic nucleus into a nucleus with atomic number decreased by one, while emitting a positron.