Question

The nucleus of most atoms is composed of which of the following sub-atomic particles? (A) tightly packed neutrons

Answer 1

Answer:

(B) tightly packed protons and neutrons

Explanation:

• Nucleus of any atom is the dense central part of any atom.
• It consists of two sub-atomic particle namely proton and neutron.
• These sub-atomic parts are tightly packed in nucleus which makes the nucleus dense .
• This dense nucleus is responsible for most of the mass of atom.
• The atomic mass for any atom is decided by sum of  the mass of proton and neutron

Thus, correct answer is

(B) tightly packed protons and neutrons