and charges change when it undergoes Alpha decay causes the alpha and beta decay. atomic number to decrease by two units and the mass number by four units. There is no change in mass number during beta decay but the atomic number increases by one unit. Students are not required to recall these two examples. The emission of a gamma ray does not cause the mass or the charge of the nucleus to change. Describe the process 4.3.2.3 Radioactive is random, 1 Plot a of throw against Students can use of radioactive decay as so it is not possible to predict decay. Skittles or M&Ms to Ask students to being a random event which individual nucleus will calculate the half-life. Use the graph to calculate the calculate the half-life analogous to flipping decay next. But with a large Ask students to throw lots of coins not half-life of the Skittles. of a radioactive – enough number of nuclei it is out a cupful of sweets knowing which coins source from a decay MS 4a possible to predict how many and count the ones with will fall on heads but curve of a radioactive will decay in a certain the letter uppermost. knowing about half of Determine the half-life of a element. them will on any given amount of time. Count and remove radioactive isotope from given throw. these. Throw the information. The half-life of a radioactive isotope is the average time it
Alpha decay causes the atomic number to decrease by two units and the mass number by four units. There is no change in mass number during beta decay but the atomic number increases by one unit. Students are not required to recall these two examples. The emission of a gamma ray does not cause the mass or the charge of the nucleus to change. and charges change when it undergoes alpha and beta decay. 4.3.2.3 Radioactive is random, so it is not possible to predict which individual nucleus will decay next. But with a large enough number of nuclei it is possible to predict how many will decay in a certain amount of time. The half-life of a radioactive isotope is the average time it Describe the process of radioactive decay as being a random event analogous to flipping lots of coins – not knowing which coins will fall on heads but knowing about half of them will on any given throw. 1 Plot a of throw against decay. Use the graph to calculate the half-life of the Skittles. MS 4a Determine the half-life of a radioactive isotope from given information. Students can use Skittles or M&Ms to calculate the half-life. Ask students to throw out a cupful of sweets and count the ones with the letter uppermost. Count and remove these. Throw the Ask students to calculate the half-life of a radioactive source from a decay curve of a radioactive element.
AQA-8465-SOW-IWE.DOCX