Question | Answer |
Describe chemical and physical change | chemical = new product made and the atoms rearrange to chemically make new products and irreversible, physical = change of state and reversible
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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 acid | chloride, 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 properties | pH, reactivity with water/oxygen/acid
| Describe three physical properties | appearance, 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, 24 | 25.2
| 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 melting | solid to a liquid
| Describe condensation | gas to a liquid
| State the halogens | fluorine, 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 reactivity | Lithium, sodium, potassium, rubidium, caesium, francium
| Explain how catalysts work | speed up reactions without being used up
| Explain alloys and give examples | mixture 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 corrosion | rusting is iron reacting with oxygen and water, corrosion is any other metal reacting with oxygen |