Here's why:
* Hydrogen is the simplest atom. It has only one proton and one electron.
* The nucleus is the central part of an atom. It contains the protons and neutrons.
* In the case of hydrogen, the nucleus only has one proton.
Therefore, a hydrogen nucleus is essentially just a single proton.
Key points to remember:
* Proton: A subatomic particle with a positive charge.
* Neutron: A subatomic particle with no charge.
* Electron: A subatomic particle with a negative charge.
* Isotopes: Different versions of the same element with the same number of protons but different numbers of neutrons. For example, there is a rare isotope of hydrogen called deuterium which has a neutron in addition to its proton.
Let me know if you have any other questions!
