All nuclei consist of two types of particles- protaon and neutrons. Nuclear force is the strongest froce. Stability of nucleus is determined by the neutron - proton ratio or mass defect or binding energy per nucleus or packing fraction. Shape of nucleus is calculated by quadrupole moment. Spin of nucleus depends on even or odd mass number. Volume of nucleus depends on the mass number. Whole mass of the atom (nearly `99 %`) is centered at the nucleus. Magnetic moment of the nucleus is measured in terms of the nuclear magnetons.
The correct statements about nuclear force is/are

Options

A. Charge independent
B. short-range force
C. non-conservation force
D. spin-dependent force

Explanation

To determine the correct statements about nuclear force, we need to analyze the properties of nuclear force based on the information provided. Here’s a step-by-step solution:

### Step 1: Understanding Nuclear Force
Nuclear force is the interaction that holds the protons and neutrons (nucleons) together in the nucleus. It is essential to understand its characteristics to evaluate the statements.

**Hint:** Consider the fundamental properties of forces in nuclear physics.

### Step 2: Charge Independence
Nuclear force is charge-independent, meaning it acts equally between protons and neutrons, regardless of their charge. This implies that the force between two neutrons is the same as the force between a neutron and a proton.

**Hint:** Think about how forces behave differently based on charge.

### Step 3: Short-Range Force
Nuclear force operates over a very short range, typically on the order of a few femtometers (10^-15 meters). Beyond this range, the force rapidly diminishes and becomes negligible.

**Hint:** Recall the distances at which nuclear interactions are significant.

### Step 4: Non-Conservative Nature
Nuclear force is classified as a non-conservative force. This means that the work done by the nuclear force depends on the path taken and is not solely determined by the initial and final states.

**Hint:** Differentiate between conservative and non-conservative forces.

### Step 5: Spin Dependence
The strength of the nuclear force can depend on the spin of the nucleons involved. For instance, the interaction between two nucleons can vary based on their spin orientation (parallel or antiparallel).

**Hint:** Consider how particle properties like spin can influence interactions.

### Step 6: Conclusion
Based on the analysis of the characteristics of nuclear force, we can conclude that all four statements regarding nuclear force are correct:
1. Nuclear force is charge-independent.
2. Nuclear force is a short-range force.
3. Nuclear force is a non-conservative force.
4. Nuclear force is spin-dependent.

Thus, the answer to the question is that all four options are correct.

---