WorksheetsParticle and Nuclear Physics I
Total questions: 5
Worksheet time: 8mins
A uranium-238 nucleus, 238U92 , undergoes a series of nuclear decays to form uranium-234, 234U92 .
Which series of decays could give this result?
emission of four β− particles
emission of four γ – rays
emission of one α -particle and two β− particles
emission of two α -particles and eight β− particles
When α -particles are fired at a thin metal foil, most of the particles pass straight through but a few are deflected by a large angle.
Which change would increase the proportion of α -particles deflected by a large angle?
using α -particles with greater kinetic energy
using a double thickness foil
using a foil made of a metal with fewer protons in its nuclei
using a source emitting more α -particles per unit time
A nucleus of neptunium-236 contains 93 protons and 143 neutrons. This nucleus decays with the emission of an α -particle. The nucleus formed then emits a β− particle. Which diagram shows the changes in the number P of protons and the number N of neutrons in these nuclei?
A
B
C
D
Which statement about two nuclei that are isotopes of the same element is correct?
The nuclei each have the same acceleration when in the same uniform electric field.
The nuclei each have the same number of neutrons.
The nuclei each have the same number of nucleons.
Uncharged atoms containing the nuclei each have the same number of electrons.
What is a conclusion from the alpha-particle scattering experiment?
Protons and electrons have equal but opposite charges.
Protons have a much larger mass than electrons.
The nucleus contains most of the mass of the atom.
The nucleus of an atom contains protons and neutrons.
