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Alpha Decay

In an alpha d...

Question

In an alpha decay the mass number of an element decreases by __.

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Solution

In alpha decay, the nucleus emits an alpha particles, which has two protons and two neutrons. Now, remember, mass number = number of protons + number of neutrons. Therefore the decrease in mass number is 2+2=4

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In an alpha decay, the mass number of an element decreases by ___

In an alpha decay, the atomic number of an element decreases by __.

Q. In an alpha decay the atomic number of an element decreases by __.

α

-decay, the atomic number of parent element _____________ and mass number ___________ by

4

Q. STATEMENT - 1 :

_{Z} X^{A}

α

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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