A decrease in atomic number is observed during

Alpha emission

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Positron emission

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Electron capture

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All of the above

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Solution

The correct option is D
All of the above

In the following nuclear reactions, there will be a decrease in atomic number (Z)
$_{Z} X^{A} \to_{2} H e^{4} +_{Z - 2} Y^{A - 4}, α - e m i s s i o n$
$_{Z} X^{A} \to_{+ 1} e^{0} +_{Z - 1} Y^{A}$ , positron emission
$_{Z} X^{A} +_{+ 1} e^{0} \to_{Z - 1} Y^{A}$ , electron capture
In beta emission, an increase in atomic number is observed
$_{Z} X^{A} \to_{- 1} e^{0} +_{Z + 1} Y^{A}, β - e m i s s i o n$

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Similar questions

Q. Decrease in atomic number is observed during :
A)

α

-emission
B)

β

-emission
C) positron emission
D) electron capture

Q. Assertion :Electron capture occurs more often than positron emission in heavy elements. Reason: Heavy elements exhibit radioactivity.

For the (positron) emission from a nucleus, there is another competing process known as electron capture (electron from an inner orbit, say, the K−shell, is captured by the nucleus and a neutrino is emitted).

Show that if emission is energetically allowed, electron capture is necessarily allowed but not vice−versa.

Q. For the

β^{+}

(positron) emission from a nucleus, there is another competing process known as electron capture (electron from an inner orbit, say, the K shell, is captured by the nucleus and a neutrino is emitted).

e^{+} +_{Z}^{A} X \to_{Z - 1}^{A} Y + v

Show that if

β^{+}

emission is energetically allowed, electron capture is necessarily allowed but not vice versa.

Q. For the β+(positron) emission from a nucleus, there is anothercompeting process known as electron capture (electron from an innerorbit, say, the K–shell, is captured by the nucleus and a neutrino isemitted).1A A e X Y Z Z ν++ → + −Show that if β+emission is energetically allowed, electron captureis necessarily allowed but not vice–versa.

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