The nuclear model of the atom

A student builds a model of an atom. Inside the model there are 24 electrons, 25 protons and 26 neutrons. Some of these particles are located in a nucleus at the centre of the model.

May/June 2015

A proton carries charge $q$ and has mass $m$. What are the charge and the mass of an alpha-particle?

May/June 2019

In the Geiger-Marsden experiment, alpha-particles are directed at a thin gold sheet. The majority of alpha-particles travel straight through the thin gold sheet. A small number are deflected. What may be inferred from this experiment?

May/June 2022

The findings from a scattering experiment indicate that most of an atom’s matter is concentrated in a very small nucleus. What is being scattered in this experiment?

May/June 2023

What of the following is supported by the results of the alpha-particle scattering experiment?

May/June 2023

In the Geiger-Marsden experiment, a beam of alpha-particles is directed at a very thin sheet of gold foil in a vacuum. What conclusion is drawn from this experiment?

Oct/Nov 2015

A thin beam of alpha-particles is directed at a very thin sheet of gold foil. In which direction do the greatest number of alpha-particles finally travel?

Oct/Nov 2017

A thin sheet of gold foil is bombarded with a narrow beam of alpha-particles. In which direction do the greatest number of alpha-particles travel after this?

Oct/Nov 2017

The results from the alpha-particle scattering experiment provided evidence for which of the following?

Oct/Nov 2018

Lithium occurs in more than one isotope. Fig. 8.1 shows a neutral atom of a radioactive lithium isotope (Li). The nucleus is surrounded by three electrons in orbits. The nuclide symbols for lithium isotopes are written as $^{X}_{Y}\mathrm{Li}$, where X and Y are numbers.

Oct/Nov 2025