It is the scientist Rutherford. He proposed it in year 1919.
Protons are contained within the nucleus, electrons surround the nucleus at a considerable distance (atomically speaking)
The nucleus of an atom contains protons and neutrons. Different amount of neutrons- Isotopes. Different amount of protons- Different element.
6.
The atomic number of an element is equal to the number of protons contained in the atomic nucleus.
The number of protons in the nucleus of an element gives that element its ATOMIC NUMBER.
Protons and Neutrons.
12 protons and no electrons
nucleus
Protons are contained within the nucleus, electrons surround the nucleus at a considerable distance (atomically speaking)
goldstein
The nucleus of an atom contains protons and neutrons. Different amount of neutrons- Isotopes. Different amount of protons- Different element.
The protons which are contained in the nucleus.
Protons and neutrons. Virtually all of the atom's mass.
Ytterbium (Yb)
6.
Protons and neutrons, except in hydrogen which has just one proton.
because they are contained inside the subsection of the atom (nucleus.)