Chapter 1: Atomic structure and the periodic table
Lesson 1: Elements and compounds Lesson overview AQA Specification reference AQA 4.1.1.1
Learning objectives Identify symbols of elements from the periodic table. Recognise the properties of elements and compounds. Identify the elements in a compound. Learning outcomes Recognise that the periodic table contains all known elements and be able to use names and symbols of the first twenty elements. [O1]
Describe how a compound such as iron sulfide is made from elements in a chemical reaction. [O2] Distinguish between formulae for elements and compounds and name the elements in a compound. [O3] Skills development WS 1.2 Use a variety of models such as representational, spatial, descriptive, computational and mathematical to solve problems, make predictions and to develop scientific explanations and understanding of familiar and unfamiliar facts.
WS 3.5 Interpret observations and other data (presented in verbal, diagrammatic, graphical, symbolic or numerical form), including identifying patterns and trends, making inferences and drawing conclusions.
WS 4.1 Use scientific vocabulary, terminology and definitions. Resources needed: Student copies of the periodic table, class poster of the periodic table, circles of coloured card or plasticine to model atoms (optional), Worksheet 1.1.1, Worksheet 1.1.2, Practical sheet 1.1, Technician notes 1.1.
Digital resources Internet access is required for the ‘Extend’ section Key vocabulary balanced, compound, element, equation, symbol
Teaching and learning Engage Display 12 kg of barbecue charcoal and identify it as the average mass of the element carbon in a 15-yearold girl. Introduce the idea that we get carbon into our bodies by eating. [O1] Ask for examples of foods that contain carbon and discuss the fact that that the element carbon cannot be seen because it is chemically joined with other elements in compounds. Bread can be toasted to make the compounds (carbohydrates and proteins) in it react and leave a layer of carbon on its surface. [O1] Remind students that our bodies excrete some carbon when we breathe out. We cannot see the particles of carbon because it is now combined with oxygen as carbon dioxide. Establish that carbon is an element and carbon dioxide is a compound.
Challenge and develop Low demand
Explain that carbon is one of 92 naturally occurring elements and there are 26 more that are made synthetically. Show students how we organise these elements in the periodic table. They can practice finding symbols for named elements to familiarise themselves with the table. Explain that all the compounds in the known Universe are made from these elements. Students can answer questions 1 and 2 on Worksheet 1.1.1. [O1]
Collins GCSE Science
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