5.1.1.6 The relative atomic mass of Students should be able 0.5 YouTube: an element is an average to calculate the relative value that takes account of atomic mass of an the abundance of the element given the isotopes of the element. percentage abundance of its isotopes. 5.1.1.7 The electrons in an atom Students should be able 0.5 Describe how many YouTube: Role play using students – occupy the lowest available to represent the electrons there can be in to represent protons, energy levels (innermost electronic structures of the first, second and third neutrons and electrons, available shells). the first twenty elements energy shells. YouTube: build up the idea of full and of the periodic table in complete energy shells with The electronic structure of an both forms. 2 in the first, 8 in the second atom can be represented by and 8 in the third energy numbers or by a diagram. Students may answer questions in terms of shell. either energy levels or shells. WS 1.2 Ma 5b For example, the electronic structure of sodium is 2,8,1 or showing two electrons in the lowest energy level, eight in the second energy level and one in the third energy level.
5.1.1.6 The relative atomic mass of an element is an average value that takes account of the abundance of the isotopes of the element. Students should be able to calculate the relative atomic mass of an element given the percentage abundance of its isotopes. 0.5 YouTube: 5.1.1.7 The electrons in an atom occupy the lowest available energy levels (innermost available shells). The electronic structure of an atom can be represented by numbers or by a diagram. For example, the electronic structure of sodium is 2,8,1 or showing two electrons in the lowest energy level, eight in the second energy level and one in the third energy level. Students should be able to represent the electronic structures of the first twenty elements of the periodic table in both forms. Students may answer questions in terms of either energy levels or shells. 0.5 Describe how many electrons there can be in the first, second and third energy shells. Role play – using students to represent protons, neutrons and electrons, build up the idea of full and complete energy shells with 2 in the first, 8 in the second and 8 in the third energy shell. WS 1.2 Ma 5b YouTube: YouTube:
AQA-8464-SOW-ATOMIC.DOCX