Which of the following conclusions were drawn from the ` alpha`-rays scattering experiment?

Options

A. The atom as a whole is positively charged.
B. The mass of the atom is concentrated at the centre of the atom , called the nucleus.
C. The empty space around the nucleus is occupied by electrons in well-defined orbits .
D. The atoms as a whole may be assumed to be an empty space .

Answer

A:B:C:D