Do you mean number of protons in a nucleus? The nucleus is part of an atom.
try counting
The number of protons in the nucleus of the atom determine its identity.
Carbon atoms are made up of a nucleus containing protons and neutrons, surrounded by electrons. Oxygen atoms also have a nucleus with protons and neutrons, but they have a different number of electrons which determine their chemical properties and behavior.
The total number of protons and neutrons in an atoms nucleus. The proton number on the other hand states just the number of protons in an atoms nucleus, hence the atomic number take away the proton number equals the number of neutrons in an atoms nucleus.
atomic number
The number and arrangement of electrons in the atom's electron cloud determine its chemical properties. Electrons are involved in chemical reactions as they interact with other atoms. The number of protons in the atom's nucleus also plays a role in determining its chemical properties by defining its atomic number and identity.
The number of protons in a nucleus is called the proton number, or atomic number. It is what defines which element we have.
atomic number
The atomic radius depends on the the number of electron shells, total negative charge, positive charge of the nucleus, atomic mass.
really the number of atoms in a nucleus is never the same in any matter but it can have a changing nucleus it depends.
An element can be identified by the number of protons in the nucleus of its atoms.
To determine which atoms in a table are of the same element, you would look for atoms that have the same atomic number, as this identifies the element. Atoms of the same element will also have the same number of protons in their nucleus. If isotopes of an element are present, they will have the same atomic number but different mass numbers due to varying numbers of neutrons.