The sub-atomic particles located in the nucleus of an atom are?

1. Analyze the question

The question asks for the specific sub-atomic particles that are found within the nucleus (the central core) of an atom.

2. Explain the concept

An atom is composed of three main sub-atomic particles:

• Protons: These are positively charged particles found inside the nucleus.
• Neutrons: These are neutral (no charge) particles also found inside the nucleus.
• Electrons: These are negatively charged particles that orbit the nucleus in specific energy levels or shells.

The nucleus is the dense center of the atom, and because it contains both protons and neutrons, it is collectively referred to as the nucleon.

3. Show the solution

• Step 1: Identify the location of each particle. • Protons: Nucleus • Neutrons: Nucleus • Electrons: Shells/Orbitals outside the nucleus
• Step 2: Evaluate the options based on the location. • Option A (neutron and proton): Both are in the nucleus. This is correct. • Option B (proton and electron): Electrons are not in the nucleus. • Option C (proton and ions): Ions are charged atoms, not sub-atomic particles found in the nucleus. • Option D (neutron and electron): Electrons are not in the nucleus.

4. Identify the answer

The correct option is A.

5. Tip

Remember the acronym "PEN":

• Proton = Positive (in the nucleus)
• Electron = External (outside the nucleus)
• Neutron = Neutral (in the nucleus)