Question

17- The gold sheet experiment proves that a- Light is a wave b- Electron is a wave c- The atom is mostly empty d- The atom is a solid sphere

18- Uranium is radioactive material. if the photon energy emitted by this element is 15 x 10-19 J what is the wavelength of the emitted radiation? a- 204 nm b- 132 nm c- 100 nm d- 50 nm

Answer 1

17. The gold sheet experiment proves that the atom is a solid sphere. In his experiment Rutherford shooted alpha particles through a gold sheet & what he observed that some of the alpha particles were deflected at defferent angles in different directions which proved that the atom is dense from inside. So, option-d is a correct choice.

18.