Question

The fundamental particles present in the nucleus of an atom are ________
A. alpha particles and electrons
B. neutrons and protons
C. neutrons and electrons
D. electrons, neutrons and protons

Answer 1

Hint: The Greek philosopher Democritus discovered the idea for the atom. Although the idea was not recognised for more than 2000 years. John Dalton re-introduced the concept of atom in 1800. In the nucleus of an atom only the positive charge and another one which is neutral are present. Nucleus contains positively charged particles and no charged particles.

Complete Step-by-Step Answer:
The nucleus is charged positively at the centre of an atom and it stores most of its mass. Nucleus is composed of protons, which is positively charged, and also neutrons, which do not have any charge.
The atom is the smallest unit of matter which is composed of 3 subatomic particles: among them one is the proton, other one is the neutron, and the last is the electron. Protons and neutrons help in making up the nucleus of the atom, a much denser and positively charged area, whereas the one which is negatively charged known as electrons can be located around the nucleus in an electron cloud.

Hence, Option B is correct

Additional Information:
Atom consists of a nucleus which is made of protons and neutrons which are orbited or surrounded by electrons. Atoms are known as the basic units of matter and the most defining structure of elements. The terminology atom is a Greek word which means cannot be divisible or indivisible, as once it was thought that atoms were the smallest things in the universe and one that could not be divided.

Note: A proton is a subatomic particle which contains a positive charge which makes it a positively charged particle. It is located in the nucleus of an atom. Neutrons are also found in the atomic nucleus along with protons. Neutrons are known for their neutral charge or actually not having any charge at all.