AQA Development of atom, Isotopes, Radiation andNuclearEquations

Who proposed the nuclear model of the atom?

• J.J. Thomson

• Ernest Rutherford

• John Dalton

• James Chadwick

What did the alpha particle scattering experiment show?

• Atoms are indivisible

• Electrons are in shells

• Most of the atom is empty space

• Protons have a positive charge

Who discovered the electron?

• John Dalton

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

What is the charge of a proton?

• -1

• 0

• +1

• +2

What is an isotope?

• Atoms with different numbers of electrons

• Atoms with different numbers of neutrons

• Atoms with different numbers of protons

• Atoms with different charges

What part of the atom changes in isotopes?

• Electrons

• Neutrons

• Protons

• Nucleus charge

What is the relative mass of an electron?

• 1

• 0.0005

• 0.0001

• Negligible (Very small) or 1/1836

What is emitted during alpha decay?

• A helium nucleus

• An electron

• A neutron

• A gamma ray

Which radiation has the highest penetrating power?

• Alpha

• Beta

• Gamma

• Neutron

Which radiation is most ionising?

• Alpha

• Beta

• Gamma

• X-rays