protons
what is the boron number in an atomic number/
Particles in the universe
It is 4.0026 : the atomic mass can be a fraction.
The atomic mass of an isotope of an element is the mass of the nucleons (neutrons + protons) in an atom of that isotope. This is nearly, though not exactly, equal to the number of nucleons, and so is nearly a whole number.The main cause for the atomic mass being fractional is that most elements have numerous isotopes, each with a different number of neutrons and so a different atomic mass. The atomic mass for an element is the average of the atomic masses of all its isotopes, weighted together in the proportion of the isotopes' abundance on earth. It is this weighting together that results in the numbers being fractional.
Prime number
The number of electrons
Atomic number is same as the number of protons and number of electrons.
protons and electrons
The atomic number is the number of protons in the nucleus. The protons are positive particles, and so the number of them is matched by the number of electrons orbiting the nucleus. The organisation of the electrons determines how an element behaves when it reacts.
The proton
They don't contain the same number of particles because some particles are more dense than others making one atom and another atom the same mass but not have the same number of particles.
The "Atomic number" of an element corresponds to the number of only the protons in the nucleus of its atoms. Add to that the number of neutrons that are also in there, and you have the "Atomic weight".
protons is the same number as the atomic number always and protons plus the average number of neutrons makes up the atomic mass
The number of protons determines the element, and is the same as its atomic number.
Number of protons in the nucleus is the atomic number.
Atomic number = number of protons = number of electrons (in the neutral state)
We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.