AQA Chemistry Unit 3 Module 1 Periodic Table 3.0 / 5 based on 1 rating ? ChemistryThe Periodic TableGCSEAQA Created by: Jessica CzinkCreated on: 25-04-13 19:55 Who proposed the law of octave sin 1863? Newlands 1 of 13 Why was Medleev's table better than Newland's? He left gaps for undiscoverd elements 2 of 13 Why do elements in a group have similar properties? Their atoms have the same number of electrons in their outer shell 3 of 13 What happens to the reactivity of an akali metal as you go down the group (increase the number of shells)? They get more reactive 4 of 13 What are the elements in group 1 called? Alkali metals 5 of 13 What are the characteristics of alkali metals? Low melting and boiling points, react readily with air and water & low densities 6 of 13 Group 1 elements react with halogens to produce what? Salts that are white or colourless crystals 7 of 13 What type of elements are situated between Group 2 and 3? Transition metals 8 of 13 What are characteristics of transition metals? High melting and boiling points, malleable, ductile, strong, dense & good conductors of heat and electricity 9 of 13 Compounds of ........ are often brightly coloured. Transition metals 10 of 13 Why do halogens have low melting points? They have small molecules 11 of 13 What charge do halide ions have? 1- 12 of 13 What happens to the reactivity and colour of the halogens as you go down the group? They get less reactive and darker in colour 13 of 13
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