Radioactivity(AS Level)

Which diagram represents the quark composition of an antineutron?

• A

• B

• C

• D

• A

• B

• C

• D

Which statement about two nuclei that are isotopes of the same element is correct?

• A The nuclei each have the same acceleration when in the same uniform electric field. .

• .B The nuclei each have the same number of neutrons.

• C The nuclei each have the same number of nucleons.

• D Uncharged atoms containing the nuclei each have the same number of electrons.

What is a conclusion from the alpha-particle scattering experiment?

• A Protons and electrons have equal but opposite charges.

• B Protons have a much larger mass than electrons.

• C The nucleus contains most of the mass of the atom.

• D The nucleus of an atom contains protons and neutrons.

Which particle is a hadron?

• A electron

• B neutrino

• C positron

• D proton

An element has two isotopic forms. What are the nuclear arrangements of these two isotopes?

• A They have different nucleon numbers and different proton numbers.

• B They have different nucleon numbers but the same proton number.

• C They have the same nucleon number and the same proton number.

• D They have the same nucleon number but different proton numbers.

A hadron has a charge +e, where e is the elementary charge. Which combination of up (u) and down (d) quarks could form this hadron?

• A ddd

• B udd

• C uud

• D uuu