Who carried out the alpha particle scattering experiment that led to the nuclear model of the atom, and in which year?

Describe the method used in Rutherford's alpha particle scattering experiment.

State the three key observations of Rutherford's alpha particle scattering experiment.

Why did most alpha particles pass straight through the gold foil?

Why were a very small number of alpha particles deflected straight back?

Some alpha particles are deflected through small angles because the positive alpha particles are repelled by the ______, which contains most of the atom's mass.

True or False? Alpha particles used in Rutherford's experiment are positively charged.

Define nucleus.

Define ion.

How are positive and negative ions formed?

What is the proton number of an atom, and what does it determine?

What is the nucleon number of an atom?

How is the number of neutrons in an atom calculated?

In nuclide (ZAX) notation, the top number A represents the ______ number, equal to the total protons and neutrons in the nucleus.

Define isotopes.

True or False? Isotopes tend to be more stable than non-isotope atoms of the same element.