Element, mixture, compound

• An atom is the smallest neutral part of an element that can take part in chemical reactions
• An element is made up of one type of atom
• A compound are 2 or more different elements that are chemically combined together
• A molecule is 2 or more elements joined together
• A mixture is 2 or more substances that are not chemically combined. They are mixed together, they can usually be separated by physical methods.
• What is a chemical change?

  Its when a reaction occurs between 2 or more substances to create a new chemical
• What is physical change?


  Its a change where no new substances are formed
• What type of atom is this?

  An element

  
• What atom is shown below?

  A compound

  
• What atom is this?

  A compound

  
• What atom is shown below?

  A mixture

  
• Is this a compound or a mixture?

  A mixture

  
• What are the signs of a chemical reaction?

  • Colour change
  • Temperature change
  • Gas produced ( fizzing/bubbles )
  • Precipitate ( Solid produced )
• Rules of naming compounds

  1. Metals come first
  2. 2 elements, ending " ide "
  3. 2 elements AND oxygen, ending " ate "
• Word equations are always reactants - products
• When dissolved beryllium chloride reacts with dissolved silver nitrate in water, aqueous beryllium nitrate and silver chloride powder is made

  beryllium chloride + silver nitrate -> beryllium nitrate + silver chloride
• When isopropanol burns in oxygen, carbon dioxide, water and heat are produced. 


  isopropanol + oxygen -> carbon dioxide + water + heat
• When dissolved sodium hydroxide reacts with sulfuric acid, aqueous sodium sulphate, water and heat are produced

  sodium hydroxide + sulfuric acid -> sodium sulfate + water + heat
• When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is formed in an exothermic reaction.

  fluorine gas + calcium -> calcium fluoride
• What type of metals are group 1?

  Alkali metals

  
• What is group of 7?

  Noble gases

  
• What is group 0?

  Halogens

  
• What type of metals is shaded in baby pink?

  Transition metals

  
• Metals on a periodic table are always left
• non-Metals on a periodic table are always right
• On the periodic table, columns = groups and rows = periods.
• Magnesium oxide is an example of a compound
• sodium chloride is a compound
• The symbol of Oxygen is O
• The symbol of Carbon is C
• The symbol of Lithium is Li
• The symbol of Sodium is Na
• The symbol of potassium is K
• The symbol of Helium is He
• The symbol of Magnesium is Mg
• Mg + O2 -> MgO

  = magnesium oxide
• Be + F2 -> BeF2

  Beryllium Fluoride
• 2K + Cl2 -> 2KCl

  Potassium Chloride
• Be + S -> BeS

  Beryllium Sulphide
• NaCl contains sodium chloride