Question

A neutron breaks down to form ?

A. A proton and an electron

B. Two protons

C. A helium nucleus

D. An alpha particle



What particle decomposes to produce the electron of beta radiation?

A. Electron

B. Neutron

C. Proton

D. Positron



What is the change in atomic mass when an atom emits gamma radiation?

A. Mass increases by 1

B. Mass decreases by 1

C. Mass remains the same

D. Mass decreases by 2


What is the change in the atomic number when an atoms emits an alpha particle?

A. Increases by 2

B. Increases by 1

C. Decreases by 4

D. Decreases by 2

Answer 1

1. A.) A proton and electron.

2. C.) Proton.

3. C.) Mass remains the same.

4. D.) Decreased by 2.

Answer 2

Answer:

1) The correct answer is option A.

2) The correct answer is option B.

3) The correct answer is option C.

4) The correct answer is option C.

Explanation:

Alpha Decay, a heavier nuclei decays into lighter nuclei by releasing alpha particle. The mass number is reduced by 4 units.

$_A^Z\textrm{X}\rightarrow _{A-2}^{Z-4}+_2^4\alpha$

In Beta-decay, a neutron breaks down into proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

$_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta$

In Gamma ray emission, an unstable nuclei gives out large amount of energy by a spontaneous electromagnetic process and releases $\gamma$ -radiations. These radiations are electrically neutral.

$_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma$