The number of protons in the nucleus of the atom.
Protons and neutrons are the components of the atomic nucleus; the number of protons is equal to the atomic number, the most important parameter for a chemical element. Electrons surround the nucleus and are responsible (the last level) for the chemical properties of elements.
The subatomic particles located in an atom's nucleus are protons and neutrons. Uranium has an atomic number of 92, thus has 92 protons. That means 235U must have 235 - 92 = 143 neutrons.
An isotope is defined as: Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element So basically, an isotope is from the same place (element) and has the same number of protons, but the number of electrons differ. So isotopes are not subatomic; the protons and electrons that make an isotope are subatomic.
The number of protons is unique for every element.Varying the number of neutrons will give you an isotope of the same element.Varying the number of electrons will give you an ion of the same element.
protons, neutrons and electrons are the main subatomic particles of the atom. There are the same number of protons as electrons, which is equal to the atomic number. The number of neutrons may vary according to the isotope of the element.
Number of protons in the nucleus is the atomic number.
Atomic number = number of protons or number of electrons
Proton
The two subatomic particles are protons and electrons. They match the atomic number on periodic table.
Atomic number is same as the number of protons and number of electrons.
Atomic number is equal to the number of protons and electrons (in a neutral atom).