proton - a tiny positive particle found inside the nucleus of an atom, neutron - a tiny particle found in the nucleus of an atom. It is electrically neutral, carrying no charge, nucleon - A particle in the centre of an atom (proton or neutron), electron - A tiny particle with a negative charge that moves around the nucleus of an atom., relative mass - number of protons and neutrons in an atom, relative charge - The electrical charge compared to other particles (like protons and electrons)., isotope - atoms that have the same number of protons but different number of neutrons. They have the same atomic number but different mass numbers., ion - An atom or molecule that has gained or lost electrons, giving it a charge., group (periodic table) - A column of elements that have similar chemical properties, period (periodic table) - A row of elements on the periodic table that have the same number of electron shells, atomic number - Number of protons, configuration - How things are arranged, monotomic - A single atom not bonded to anything else, inert - Not very reactive,

Unit 3: Elements & Periodic Table

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