Chem 1.2 Modern Periodic Table 3.0 / 5 based on 1 rating ? ChemistryThe Periodic TableGCSEAQA Created by: DanCreated on: 05-04-13 14:34 When did scientists find out about Protons and Electrons? 20th Century 1 of 13 How are elements arranged now? Atomic (Proton) Numbers 2 of 13 How were they lined? Vertically 3 of 13 What do electrons in the outermost shell determine? Its chemical property 4 of 13 What does reactivity depend on? The number of electrons in the outermost shell 5 of 13 Whats another term for outermost shell? Highest energy level 6 of 13 What happens as you go down the elements in a group? As you go down a group the number of electrons increase 7 of 13 If an element has more electrons, is it more reactive or less? More reactive 8 of 13 Why is this? Electrons are less strongly attached to Nucleus 9 of 13 How does this make them more reactive? Electrons can be lost a lot easier 10 of 13 Do metal loose or gain electrons? Loose 11 of 13 Why? because most metals have under 4 electrons in their outershell 12 of 13 In metals reactivity increases as you go? Down the group 13 of 13
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