PHS: Edexcel P6 Radioactivity Keyterms

What is a subatomic particle?

• A model explaining the properties of matter.

• The total number of protons in an atom.

• A type of radiation emitted by radioactive isotopes.

• A particle that is smaller than an atom, such as a proton, neutron, or electron.

What does the atomic number of an element represent?

• The total mass of an atom.

• The total number of neutrons in the nucleus.

• The sum of protons and electrons in an atom.

• The number of protons in the nucleus of an atom.

Which particle has a negative charge?

• Alpha particle

• Proton

• Neutron

• Electron

What is an isotope?

• Atoms with the same number of electrons but different protons.

• A particle made of two protons and two neutrons.

• Atoms of an element with the same number of protons but different numbers of neutrons.

• Atoms of an element with different atomic numbers.

What does the atomic mass of an atom represent?

• The number of electrons in an atom.

• The total number of protons in the nucleus.

• The total number of protons and electrons.

• The total number of protons and neutrons in the nucleus.

What do we call he model that explains the properties of different states of matter

in terms of the movement of particles.

• particle model

• atomic model

• molecule model

• plum pudding model

Which type of nuclear radiation is formed of two protons and two neutrons?

• alpha

• beta plus

• beta minus

• gamma

Which type of nuclear radiation is a fast moving electron?

• alpha

• beta plus

• beta minus

• gamma

Which type of nuclear radiation is a positron?

• alpha

• beta plus

• beta minus

• gamma

Which type of particle found in the nucleus of an atom has zero charge and a relative mass of 1?

• proton

• electron

• nucleus

• neutron