Nucleus contains

Options

A. Only protons
B. Only neutrons
C. (a) and (b)
D. protons, neutrons and electrons

Answer

To answer the question "What does the nucleus contain?", we can analyze the structure of an atom step by step:

### Step 1: Understanding the Structure of an Atom
- An atom consists of a nucleus at its center and electrons that revolve around the nucleus.
- The nucleus is the dense core of the atom.

**Hint:** Remember that the nucleus is the central part of the atom.

### Step 2: Identifying Components of the Nucleus
- The nucleus is made up of two types of subatomic particles: protons and neutrons.
- Protons carry a positive charge, while neutrons have no charge (they are neutral).

**Hint:** Recall the charges associated with protons and neutrons.

### Step 3: Electrons and Their Position
- Electrons are negatively charged particles that orbit around the nucleus in various energy levels or shells.
- It is important to note that electrons are not part of the nucleus.

**Hint:** Think about the arrangement of electrons in relation to the nucleus.

### Step 4: Evaluating the Options
- Given the options:
- A: Only protons
- B: Only neutrons
- C: Both protons and neutrons
- D: Protons, neutrons, and electrons
- Since the nucleus contains both protons and neutrons, option C is the correct answer.

**Hint:** Eliminate options that do not include both protons and neutrons.

### Final Answer
The nucleus contains both protons and neutrons (Option C).