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QR Challenge: Pokemongo chemical reactions

QuestionAnswer
Describe chemical and physical changechemical = new product made and the atoms rearrange to chemically make new products and irreversible, physical = change of state and reversible
Describe a compound and an element (give examples)compound = 2 or more elements chemically joined together eg iron oxide, element= all the atoms are the same and found on the periodic table eg iron, gold
Describe the salts formed when metals react with hydrochloric, sulphuric and nitric acidchloride, sulphate and nitrate
Describe who came up with the periodic table and how they organised it Dimitri Mendeleev organised by atomic number and properties
Who was John Dalton and what were his ideas about atoms? atoms of the same element are the same, everything is made up of atoms, compounds ae formed from 2 different atoms chemically joining together
Describe three chemical propertiespH, reactivity with water/oxygen/acid
Describe three physical propertiesappearance, state, conductivity
Explain how metals react with oxygen giving examples metal + oxygen = metal oxide
Explain how metals react with water giving examples metal + water = metal hydroxide + hydrogen
Explain the reactivity of the group 1 elements and how we can predict how francium will react more reactive down the group so we can predict francium will be the most reactive
Calculate the average of the following results: 25, 23, 27, 27, 2425.2
Write the chemical symbols for oxygen, cobalt, aluminium, tungsten and tin O, Co, Al, W, Sn
Explain the 4 signs of a chemical reaction temperature, colour, smell and gas
Give examples of 4 metal and 4 non-metals iron, sodium, calcium and gold v oxygen, sulphur, neon and carbon
Describe 4 properties of non-metals malleable, ductile, sonorous, conduct electricity and heat, shiny
Balance the chemical symbol equation for Cu + HCl -> CuCl + H2 2Cu + 2HCl -> 2CuCl + H2
Analyse the graph of boiling points and describe the trend in full sentences boiling points increase down group 7
Balance the chemical symbol equation for respiration C6H12O6 + O2 -> CO2 + H2O C6H12O6 + 6O2 -> 6CO2 + 6H20
Describe meltingsolid to a liquid
Describe condensation gas to a liquid
State the halogensfluorine, chlorine, bromine, iodine, astatine
Describe the properties of the noble gases non-reactive, stable, gases, shine a different colour when electricity is passed through them
Explain the order of the alkali metals, describing the reactivityLithium, sodium, potassium, rubidium, caesium, francium
Explain how catalysts workspeed up reactions without being used up
Explain alloys and give examplesmixture of metals eg steel, durillium
Analyse and explain how you can detect a pure substance melting point data, pure=specific melting/boiling point
Compare rusting and corrosionrusting is iron reacting with oxygen and water, corrosion is any other metal reacting with oxygen

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