Activity is stable. This is a random Describe radioactive decay as a to predict which dice measured in process called radioactive process by which an unstable will land on a six (or Becquerel (Bq). decay. atom releases radiation. coins on a head)? Activity is the rate at which a How does activity change with source of unstable nuclei time? decays and is measured in Research how nuclear radiation Becquerel. was discovered and who discovered it. State that the part of the atom, which releases the radiation, is the nucleus. Describe how the emission of radiation from a radioactive atom is a random process, but over time the amount of decay can be predicted. 6.4.2.1 The nature of The nuclear radiation emitted 0.4 Are all radioactive sources the Model alpha, beta, different of may be: same? gamma and neutron nuclear radiation. decay using plasticine an particle (α) this Describe the composition of each – and/or stop frame consists of two neutrons type of radiation and where animation. Models and two protons, it is relevant, give the particle that the should show the atom identical to a helium type of radiation is identical to, eg before and after decay nucleus an alpha particle is a helium as well as the radiation nucleus. emitted. a beta particle (β) a – high electron ejected Research how with beta decay an from the nucleus as a electron happens to be in the neutron turns into a nucleus. proton
Activity is measured in Becquerel (Bq). stable. This is a random process called radioactive decay. Activity is the rate at which a source of unstable nuclei decays and is measured in Becquerel. Describe radioactive decay as a process by which an unstable atom releases radiation. How does activity change with time? Research how nuclear radiation was discovered and who discovered it. State that the part of the atom, which releases the radiation, is the nucleus. Describe how the emission of radiation from a radioactive atom is a random process, but over time the amount of decay can be predicted. to predict which dice will land on a six (or coins on a head)? 6.4.2.1 The nature of different of nuclear radiation. The nuclear radiation emitted may be: an particle (α) – this consists of two neutrons and two protons, it is identical to a helium nucleus a beta particle (β) – a high electron ejected from the nucleus as a neutron turns into a proton 0.4 Are all radioactive sources the same? Describe the composition of each type of radiation and where relevant, give the particle that the type of radiation is identical to, eg an alpha particle is a helium nucleus. Research how with beta decay an electron happens to be in the nucleus. Model alpha, beta, gamma and neutron decay using plasticine and/or stop frame animation. Models should show the atom before and after decay as well as the radiation emitted.
AQA-8464-SOW-ATOM.DOCX