Respuesta :
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
The nucleus of most atoms is composed of tightly packed protons and neutrons
The nucleus of an atom possess the following properties:
- The nucleus are positively charged
- The nucleus are surrounded by a cloud of negatively charged electrons
- The nucleus are very dense and small .
- The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are neutral
- The nucleus contributes to most of the weight of an atom.
Therefore, the nucleus is compose of tightly packed protons and neutrons
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