C1.5 Describe the nucleus of an atom as very small compared to the overall size of the atom C3b Atomic mass C1.6 Recall that most of the mass of 1) Students brainstorm Students weigh samples, of Display the nuclide and numbers an atom is concentrated in the everything they know different elements, made up so notation (AZSymbol) nucleus about ‘elements and the the masses of the samples will for some simple atoms periodic table’ be in the same proportions as on the board, and the masses of the atoms. initiate a class Recall the meaning of the term C1.7 mass number of an atom 2) Challenge students to discussion on how models of the nuclei of (links to a Maths statement). think up ways of telling Students then use the data, for these atoms could be different atoms apart. carbon and magnesium, to made. Demonstrate Describe atoms of a given work out the ratios of the mass C1.8 how the nuclei of some numbers, and the masses of element as having the same samples, in their simplest form. of the atoms described number of protons in the on the board can be nucleus and that this number constructed using is unique to that element Students should conclude that polystyrene balls of the ratios of the mass numbers different colours (e.g. of the atoms of elements are Calculate the numbers of red for protons and the same as the ratios of the protons, neutrons and 0 green for neutrons) and masses of their atoms. electrons in atoms given the adhesive putty. atomic number and mass number (links to a Maths Equipment: electronic balance Equipment: coloured statement). (at least accurate to +/- 0.1 g), polystyrene balls and labelled containers, with sealed adhesive putty and lids, containing samples of four some prepared nuclei. elements: carbon (4.5g), magnesium (9g), sulfur (12g) Digital: Protons, and copper (24g) neutrons and electrons interactive activity
C1.5 Describe the nucleus of an atom as very small compared to the overall size of the atom C3b Atomic mass and numbers C1.6 C1.7 C1.8 Recall that most of the mass of an atom is concentrated in the nucleus Recall the meaning of the term mass number of an atom (links to a Maths statement). Describe atoms of a given element as having the same number of protons in the nucleus and that this number is unique to that element Calculate the numbers of protons, neutrons and electrons in atoms given the atomic number and mass number (links to a Maths statement). 1) Students brainstorm everything they know about ‘elements and the periodic table’ 2) Challenge students to think up ways of telling different atoms apart. Students weigh samples, of different elements, made up so the masses of the samples will be in the same proportions as the masses of the atoms. Students then use the data, for carbon and magnesium, to work out the ratios of the mass numbers, and the masses of samples, in their simplest form. Students should conclude that the ratios of the mass numbers of the atoms of elements are the same as the ratios of the masses of their atoms. Equipment: electronic balance (at least accurate to +/- 0.1 g), labelled containers, with sealed lids, containing samples of four elements: carbon (4.5g), magnesium (9g), sulfur (12g) and copper (24g) Display the nuclide notation (AZSymbol) for some simple atoms on the board, and initiate a class discussion on how models of the nuclei of these atoms could be made. Demonstrate how the nuclei of some of the atoms described on the board can be constructed using polystyrene balls of different colours (e.g. red for protons and green for neutrons) and adhesive putty. Equipment: coloured polystyrene balls and adhesive putty and some prepared nuclei. Digital: Protons, neutrons and electrons interactive activity 0
GCSE9-1ScienceTerm1detailedplanning-UPDATE1.docx