In a supermarket, food is grouped in different aisles according the characteristics and properties of the food – for example: fruit and vegetables, bakery, meat, dairy, cereals. The layout of supermarkets is a good place to start. Start with analogies that students are likely to be familiar with, before moving on to less familiar examples. We can use different classification systems from everyday life to help students understand how the periodic table classifies elements. The position of an element in the periodic table helps chemists to decide whether it will be useful for a particular job.ĭownload a collection of ideas and activities from the Education in Chemistry website: rsc.li/2Z81sap Ideas for your classroomĪnalogies are a powerful way to help students understand the complexities of chemistry. They have similar chemical reactions with, for example, oxygen. The elements in a group show patterns in their physical properties such as melting or boiling point, thermal conductivity and density. unreactive gases called noble gases in group 0.the central metals block called transition metals.reactive metals called alkali metals in group 1.What students need to knowĪll known elements are listed in the periodic table. It orders and classifies all the elements according to their physical and chemical properties. They will use the periodic table to help as it is central to our understanding and classification of the world around us. So how do scientists know where to start when they are developing new or existing materials?Ĭhemists will often begin by making observations, then looking for patterns. From mobile phones to the clothes we wear, everything consists of one or more of the 118 known chemical elements.
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