* Composition: The nucleus is made up of protons (positively charged particles) and neutrons (neutral particles).
* Mass: The nucleus accounts for almost all of the atom's mass.
* Charge: The nucleus has a positive charge due to the presence of protons.
* Atomic Number: The number of protons in the nucleus determines the atomic number of an element. This number is unique to each element and defines its identity.
* Isotopes: Atoms of the same element can have different numbers of neutrons, resulting in isotopes. These isotopes have the same atomic number but different mass numbers.
* Nuclear Reactions: Chemical reactions involve the sharing or transfer of electrons. However, nuclear reactions involve changes within the nucleus itself, such as radioactive decay or nuclear fusion.
In summary, the nucleus is the heart of an atom, containing the building blocks that determine its identity and properties.
