P4.4.7 describe all the changes SP2d, g, h and i 18-19, involved in the way energy is stored when a system changes, for common situations: including an object projected upwards or up a slope, a moving object hitting an obstacle, an object being accelerated by a constant force, a vehicle slowing down P4.4.8 explain, with reference to SP8a 130-131 examples, the definition of power as the rate at which energy is transferred (work done) in a system P4.4.9 recall and apply the SP8a 131 relationship: power (W) = energy transferred (J) ÷ time (s) Chapter P5: Radioactive materials P5.1 What is radioactivity? P5.1.1 describe the atom as a SP6a 90-91 positively charged nucleus surrounded by negatively charged electrons, with the nuclear radius much smaller than that of the atom and with almost all of the mass in the nucleus P5.1.2 describe how and why the SP6a and c 90-91, Dalton is not mentioned. atomic model has changed over time to include the main ideas of Dalton, Thomson, Rutherford and Bohr P5.1.3 recall the typical size (order of SP6a An example of the size of an magnitude) of atoms and small atom (oxygen) is given, but molecules no molecules. P5.1.4 recall that atomic nuclei are SP6a, b and c 90-95 composed of both protons and neutrons, and that the nucleus of each element has a characteristic positive charge P5.1.5 recall that nuclei of the same SP6b 93 element can differ in nuclear mass by having different numbers of neutrons, these are called isotopes P5.1.6 use the conventional SP6b and m 92-93, representation to show the differences 114-115 between isotopes, including their identity, charge and mass P5.1.7 recall that some nuclei are SP6e 98-99 unstable and may emit alpha particles, beta particles, or neutrons, and electromagnetic radiation as gamma rays P5.1.8 relate emissions of alpha SP6f 100-101 particles, beta particles, or neutrons, and gamma rays to possible changes in the mass or the charge of the nucleus, or both
P4.4.7 describe all the changes involved in the way energy is stored when a system changes, for common situations: including an object projected upwards or up a slope, a moving object hitting an obstacle, an object being accelerated by a constant force, a vehicle slowing down SP2d, g, h and i 18-19, P4.4.8 explain, with reference to examples, the definition of power as the rate at which energy is transferred (work done) in a system SP8a 130-131 P4.4.9 recall and apply the relationship: power (W) = energy transferred (J) ÷ time (s) SP8a 131 Chapter P5: Radioactive materials P5.1 What is radioactivity? P5.1.1 describe the atom as a positively charged nucleus surrounded by negatively charged electrons, with the nuclear radius much smaller than that of the atom and with almost all of the mass in the nucleus SP6a 90-91 P5.1.2 describe how and why the atomic model has changed over time to include the main ideas of Dalton, Thomson, Rutherford and Bohr SP6a and c 90-91, Dalton is not mentioned. P5.1.3 recall the typical size (order of magnitude) of atoms and small molecules SP6a An example of the size of an atom (oxygen) is given, but no molecules. P5.1.4 recall that atomic nuclei are composed of both protons and neutrons, and that the nucleus of each element has a characteristic positive charge SP6a, b and c 90-95 P5.1.5 recall that nuclei of the same element can differ in nuclear mass by having different numbers of neutrons, these are called isotopes SP6b 93 P5.1.6 use the conventional representation to show the differences between isotopes, including their identity, charge and mass SP6b and m 92-93, 114-115 P5.1.7 recall that some nuclei are unstable and may emit alpha particles, beta particles, or neutrons, and electromagnetic radiation as gamma rays SP6e 98-99 P5.1.8 relate emissions of alpha particles, beta particles, or neutrons, and gamma rays to possible changes in the mass or the charge of the nucleus, or both SP6f 100-101
470144-switching-to-ocr-gcse-9-1-physics-b-from-pearson-edexcel-.docx