Weight (mass).
The number of protons in the nucleus determines the identity of the element.
An element can be identified by the number of protons in the nucleus of its atoms.
The atomic number of an element is determined by the number of protons in its nucleus.
By the number of protons in its nucleus.
The atomic number of an element is determined by the number of protons within it's nucleus.
The number of protons in the nucleus of the atom.
The atomic number is the number of protons in the nucleus of an atom, while the atomic mass is the total mass of the nucleus (both protons and neutrons)
The number of protons.
Number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus
The atomic number of an element is determined by the number of protons in the nucleus.
Its atomic number. In other words the number of positive protons in the nucleus of each atom and the number of negative electrons surrounding the nucleus of each atom.
The atomic number of an element is determined by the number of protons in its nucleus.