Chemistry Year 9 0.0 / 5 ? ChemistryIons, bonding and testing for elements.GCSEAQA Created by: Ella2001Created on: 24-04-15 20:23 What are ALLOTROPES? How are diamond and graphite the same? When an element has 2+ forms. Diamond and graphite are allotropes of carbon. 1 of 25 Why can increasing the concentration of an acid increase the rate of a reaction? (collision theory) There are more acid particles and less water particles in the same acid volume. 2 of 25 What colour does lithium give in a flame test? Bright Red 3 of 25 What colour does sodium give in flame test? Red/Yellow/Orange 4 of 25 What colour does calcium give in a flame test? Orangey-Red/Dark Red 5 of 25 What colour does potassium give in a flame test? Lilac/Pinky-Purple 6 of 25 How is a flame test carried out? Place crystals on a nichrome wire and put in blue flame on bunsen burner. Note flame colour. 7 of 25 How is an Oxygen test carried out? Put hydrogen peroxide in boiling tube. Light splint. Add maganese dioxide powder. Blow out splint until in glows, place gas in boiling tube. 8 of 25 What is the only gas that turns indicator blue? Ammonia 9 of 25 What is the charge on a proton? Positive (P for Proton) 10 of 25 What is the charge on an electron? Negative 11 of 25 What is the charge on a neutron? No charge 12 of 25 How do the relative masses of protons, neutrons and electrons compare? Electrons are lightest. 13 of 25 What are isotopes? When the atomic mass number has more than one value. 14 of 25 How do you find the neutrons in an atom, via the periodic table? Take away the atomic number from the atomic mass. 15 of 25 What is diffusion? The spreading of one set of particles through another until evenly mixed. 16 of 25 Does Group 0 form ions? No, they are already stable with a full outer shell. 17 of 25 What type of bonding occurs when a metal reacts with a non-metal? Does it give or share? Ionic bonding- gives. 18 of 25 What type of bonding is it when 2 non- metals react? Giving or sharing? Covalent bonding- sharing. 19 of 25 Why are metals generally malleable? Bonds are in layers, so they can slide over eachother. 20 of 25 Why can metals conduct electricity? Free electrons roam through ions. 21 of 25 Why can ionic compounds conduct electricity when molten or in water, but not when solid? The free electrons cannot move around in solids, so cannot conduct electricity. 22 of 25 When testing for an Fe2+ ion, after adding sodium hydroxide, what do you look for? Dark green precipitate. 23 of 25 When testing for an Fe3+ ion, after adding sodium hydroxide, what do you look for? Orangey Brown Colour. 24 of 25 In testing for a Cu2+ ion, after adding sodium hydroxide, what do you look for? Blue precipitate. 25 of 25
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