first modern concept of atomic structure; all of the positive charge and most of the mass of the atom are contained in a compact nucleus; a number of electrons (equal to the atomic number) occupy the rest of the volume of the atom and neutralize the positive charge
双语例句
1
Professor Rutherford has given a theory of the structure of atoms.
卢瑟福教授给出，原子结构的理论。
2
Lord Rutherford, who proved that atoms exist, knew nothing of neutrons. Chadwick knew nothing of quarks, let alone supersymmetry.