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Physical Properties of Aromatic Compounds

What paramete...

Question

What parameter is used to measure the stability of a nucleus?

A

Average binding energy

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B

No. of protons

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C

No. of neutrons

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D

No. of electrons

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Solution

The correct option is A Average binding energy
Stability of nucleus is based on average binding energy i.e. binding energy per nucleon. This much energy will be needed for nucleon to break free.

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Q. The parameter used to measure the stability of the nucleus is

Q. Nuclear binding energy is the energy released during the hypothetical formation of the nucleus by the condensation of individual nucleons. Thus, binding energy per nucleon =

\frac{Total binding energy}{Number of nucleons}

For example, the mass of hydrogen atom is equal to the sum of the masses of a proton and an electron. For other atoms, the atomic mass is less than the sum of the masses of protons, neutrons and electrons present. This difference in mass, termed as mass defect, is a measure of the binding energy of protons and neutrons in the nucleus. The mass-energy relationship postulated by Einstein is expressed as:

Δ E = Δ m c^{2}

Δ E

is the energy liberated,

Δ m

is the loss of mass, and c is the speed of light.

M P

M n

are masses of a proton and a neutron respectively. For a nucleus, its binding energy is

B

and it contains

Z

N

neutrons, the correct relation for this nucleus if

C

is velocity of light is:

If the charges of protons and neutrons is switched to negative and positive, will it affect the stability of atoms? justify

_{2} H e^{4}

0.03

amu less than the sum of the masses of

2

2

neutrons. What is the binding energy per nucleon?

Q. The masses of neutron and proton are

1.0087

1.0073

amu respectively. If the neutrons and protons combine to form a Helium nucleus of mass

4.0015 a m u

, the binding energy of the Helium nucleus will be :

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