AQA C3 Chapter 1 - The development of the periodic table 0.0 / 5 ? ChemistryThe Periodic TableGCSEAQA Created by: MDHerbertRLSCreated on: 12-01-16 21:17 Group A vertical division of the periodic table containing elements with similar chemical properties. 1 of 11 Period A horizontal division of the periodic table. 2 of 11 John Newlands A British chemist who arranged the elements according to his 'Law of Octaves'. 3 of 11 Dmitri Mendeleev A Russian chemist who arranged the elements in their modern arrangement. 4 of 11 Transition Metals The large block of elements in the centre of the periodic table with similar properties. 5 of 11 Electronic structure The arrangement of the electrons in an atom. 6 of 11 Alkali metals Group 1 of the Periodic Table. Soft, silvery metals with low densities and low melting and boiling points. 7 of 11 Catalyst A substance that increases the rate of a chemical reaction but does not get used up in the process. 8 of 11 Halogens The elements of group 7 of the periodic table. 9 of 11 Diatomic molecules A molecule consisting of two atoms joined by a covalent bond. All of the halogens form diatomic molecules. 10 of 11 Displacement reaction A reaction in which a more reactive element displaces a less reactive one. 11 of 11
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