Answer:
The nucleus of an atom is the central, dense region that makes up the majority of the atom's mass but occupies only a tiny fraction of its volume. It is composed of two main subatomic particles: protons and neutrons. Protons are positively charged particles, while neutrons are electrically neutral (i.e., they have no charge). Both protons and neutrons are collectively known as nucleons.
Given that protons are positively charged and neutrons are neutral, the overall charge of the nucleus depends on the balance between the number of protons and neutrons present in it. The number of protons in the nucleus defines the atomic number of the atom, and it also determines the atom's chemical properties, making it unique for each element on the periodic table.
Since protons carry a positive charge and neutrons carry no charge, the nucleus of an atom will always have a positive charge, equal to the total number of protons it contains. The positive charge of the nucleus is balanced by an equal number of negatively charged electrons orbiting the nucleus in specific energy levels, creating a neutral atom as a whole. This is because, in a neutral atom, the number of protons in the nucleus is equal to the number of electrons surrounding the nucleus.
In summary, the nucleus of an atom has a positive charge due to the presence of protons, while the atom as a whole remains electrically neutral due to the equal number of electrons orbiting the nucleus.
Simplified: The nucleus of an atom has a positive charge due to the presence of protons.
Note: I hope this helps!