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Yr 10 Chemistry The Atom Starter Element Bingo Objectives TO KNOW the terms protons, electrons and neutrons and some of their properties TO BE ABLE draw the basic structure of the atom. TO UNDERSTAND how these particles are physically arranged in relation to each other. In the Beginning……… Even in ancient times, people sought to organize the world around them into fundamental elements, such as earth, air, fire, and water. The Greek thinker Empedocles first classified the fundamental elements as fire, air, earth, and water, although our particular diagram reflects Aristotle's classification. Atoms are made of 3 major particles. Particle Charge Relative Mass Protons +1 1 Neutrons 0 1 Electrons -1 0.0005 Atomic number = the number of protons in an atom. Atomic Structure An atom is made of 3 types of particle. In the nucleus of the atom PROTONS (negatively Charged) NEUTRONS (no charge) ELECTRONS (Moving around outside the nucleus. Negatively charged) But………………….. There is a fourth part to the atom. Extension Atomic Number and atomic mass on the periodic table.