A fun thing to do is then ‘build an atom together’ using a range of artefacts to represent the different parts. Then pose the question, ‘can this piece of paper be broken down further’? Explore ideas on the board and then introduce the idea of atoms, building on what students already know about particles. For a detailed explanation of alternative conceptions about atomic structure see this excellent publication from the RSC on chemical misconceptions.Ĭhallenge students to tear a piece of paper into the smallest size possible. Misconception : the electrons in an atom orbit the nucleus like planets in our solar system orbit the sun the nucleus of an atom is equivalent to a nucleus in a cell. Linked knowledge: periodic table, particles, bonding Atoms can differ from each other in the number of protons, neutrons and electrons they contain.įrom big idea: all matter in the Universe is made from very small particles Key concept: matter is made from discrete units called atoms. It’s worth spending time explaining how atoms are held together by electrostatic forces of attraction between electrons and the nucleus (both directions) and by nuclear forces of attraction between nucleons. As well as understanding that atoms are made from different subatomic particles, students also need to understand that these subatomic particles differ in their size, location and charge. The image here could represent a progression in how students understand atomic theory, starting with a simple billiard ball model at Key Stage 2/3 and ending with the electron cloud model at A Level. A useful way to approach the teaching of atomic structure is to consider the changing models proposed by scientists throughout history. Overview: never trust an atom, they make up everything! Atoms are the fundamental building blocks of matter and are built from protons, neutrons and electrons. Reflections of a science teacher – ten years on.Building a curriculum towards big ideas.Floating and sinking teaching resources.Bonding, structure and properties teaching resources.Balancing and writing chemical equations.The science teacher science thinking resources and pedagogy
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