Chemistry | Unit 4 | Additional Science 5.0 / 5 based on 1 ratingTeacher recommended ? ScienceChemistryGCSEOCR Created by: A♥Created on: 04-06-13 18:29 What is Covalent Bonding? When non-metals bond by sharing electrons 1 of 35 What are the main sources of water? Aquifers, Lakes, Rivers and Resevoirs 2 of 35 What state and colour is bromine at room temperature? An orange liquid 3 of 35 What charge does a proton have? Positive 4 of 35 What state and colour is Chlorine at room temperature? A green gas 5 of 35 What state and colour is iodine at room temperature? A grey Solid 6 of 35 What can be found in untreated water? Pollutants, insoluble particles, microbes, dissolved salt and minerals 7 of 35 What colour flame does Sodium produce under the fame test? Yellow 8 of 35 What colour flame does Lithium produce under the flame test? Red 9 of 35 What colour flame does potassium produce under the flame test? Lilac 10 of 35 What are the 5 non-metals in group 7 known as? Halogens 11 of 35 Which two, are convalently bonded molecules? Water and Carbon Dioxide 12 of 35 What is Ionic Boding? When a metal and a non-metal bond by transferring electrons 13 of 35 What are the properties of an alkali metals? Very fast, exothermic and violent 14 of 35 What does an alkali metal produce when its mixed with water? Hydrogen and a hydroxide 15 of 35 Who discovered atoms? Niels Bohr 16 of 35 What charge does an electron have? Negative 17 of 35 What is thermal decomposition? Breaking down a complex substance into a simple substance by heating 18 of 35 What are some properties of Group 1 Alkali metals? Have one electron in their outer shells, stored under oil and reacts vigorously with water 19 of 35 What can transitional metals and their compounds be used as? Catalysts 20 of 35 What does the atomic number tell us? How many protons/electrons an element has 21 of 35 what does the nucleus contain? Protons and neutrons 22 of 35 What is oxidation? When electrons are taken away 23 of 35 What is Reduction? When electrons are gained 24 of 35 What colour are copper compounds? Blue 25 of 35 What is a molecule? two or more atoms bonded together 26 of 35 What is used to detect halide ions Silver Nitrate Solution 27 of 35 What does the chemical industry use water for? Cooling, A solvent and cheap raw materials 28 of 35 What can be used to detect Sulphates? Barium Chloride 29 of 35 What colour precipitate does bromides form with silver nitrates? cream 30 of 35 What colour precipitate does iodides form with silver nitrates? Yellow 31 of 35 What colour precipitate does chlorides form with silver nitrates? White 32 of 35 Why do metals have high melting points? Lots of energy is needed to break the strong metallic bonds 33 of 35 What is an isotope? An atom of the same element with a different number of neutrons 34 of 35 What is iron used for? Cars 35 of 35
EDEXCEL GCSE 9-1 COMBINED SCIENCE FOUNDATION PAPER 4 CHEMISTRY 2 MARK SCHEME SAMPLE ASSESSMENT MATERIAL 0.0 / 5
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