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Standard X

Chemistry

Variation of Atomic Size

The change th...

Question

The change that will take place in the mass number and atomic number of the nucleus Y when it is emits gamma radiations

Mass number increases and Atomic number decreases

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Mass number decreases and Atomic number increases

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Mass number and Atomic number remains constant

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Mass number increases and Atomic number increases

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Solution

The correct option is C
Mass number and Atomic number remains constant

There will be no change in the mass number and atomic number of the nucleus Y. This is because gamma radiations are electromagnetic radiations and hence do not have any mass or charge.

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Similar questions

Q. A nucleus of atomic number

Z

and mass number

A

emits a

β

-particle.The atomic number and mass number of resulting nucleus is

Q. A uranium nucleus (atomic number

92

, mass number

238

) emits an

α - p a r t i c l e

and the resultant nucleus emits

β - p a r t i c l e

. What are the atomic and mass numbers of the final nucleus?
(i) Atomic number

=

_________.
(ii) Mass number

=

_________.

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. A nucleus, with mass number

m

and atomic number

n

, emits one

α

particle and one

β

particle. The mass number and atomic number of the resulting nucleus will be respectively
(Assume

β

is positron)

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.

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The change that will take place in the mass number and atomic number of the nucleus Y when it is emits gamma radiations

The correct option is C Mass number and Atomic number remains constantThere will be no change in the mass number and atomic number of the nucleus Y. This is because gamma radiations are electromagnetic radiations and hence do not have any mass or charge.

The correct option is C
Mass number and Atomic number remains constant

There will be no change in the mass number and atomic number of the nucleus Y. This is because gamma radiations are electromagnetic radiations and hence do not have any mass or charge.