The strong nuclear force between nucleons is attractive but short range; the Coulomb force between protons is long range, but repulsive.

He gas is rare, so collisions between nuclei are also rare;

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It happens and the

we see in nature was formed by this method only in Earth's atmosphere;

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Solution

The correct option is A He gas is rare, so collisions between nuclei are also rare;
Nuclear interactions are interesting battlegrounds of different forces - mainly the Coulomb force, which is electrostatic in nature, and the strong nuclear force.
The strong nuclear force is a strong attractive force, but only activates when you bring the nucleons closer to each other than a few femtometers. At these length scales, no force in the universe is stronger than the strong nuclear force.

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Q. Assertion(A): Nuclear forces arise from strong coulombic interactions between protons and neutrons.
Reason (R): Nuclear forces are independent of the charge of the nucleons.

Q. Inspite of mutual repulsion between the protons and no electric force between neutrons, a number of protons and neutrons do stay together to form stable nuclei. Which of the following are reasons for this?

1

. Another type of force, called nuclear force works between these particles when they are very close to each other

2

. The neutrons keep the protons apart so that there is no repulsion between them

3

. The nuclear force is always attractive and does not depend on the charge of the particles
Select the correct answer from the codes given.

We learnt that touching is the repulsive force between atoms and that two things are never really in contact. If so then does this repulsive force vary for different things? Are there things with a repulsive force strong enough for us to see that we can't touch it?

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