Chemistry

• Is the modern periodic table organised by atomic number or atomic mass?


  Atomic number
• What do metal atoms do in order to achieve a full outer energy level?


  Metal atoms react and loose their outer electrons to achieve a full outer energy level.
• What ions do metals always form?

  Positive ions
• What groups of elements are organised horizontally on the periodic table?

  Periods
• What are the properties of metals?


  Some properties of metals include: luster (reflective), conductive , malleable, durable and ductile.
• What are the properties of non - metals?

  Brittle, not conductive, Gaseous, not malleable and not ductile.
• What is a covalent bond?

  A bond formed between a non- metal + non- metal
• What is an ionic bond?


  Bond formed between a metal + non - metal
• Are non - metals localised(belongs to a particular atom)?

  Yes
• Are metals delocalised (another word for spread out)?

  Yes
• Are Group 0/Noble gases reactive?

  No, they are very unreactive elements.
• Do Group 0/ Noble gases have a full outer energy level?

  All Noble gases have a full outer energy level, therefore won’t react.
• What are Group 0 also referred to?


  Noble gases
• What is a common pattern in Group 0/Noble gases?

  The boiling points increase as the relative atomic mass increases.
• What are Group 1 also referred to?

  Alkali metals
• How many electrons do Group 1 have on its outer energy level?

  1
• Does Group 1 react rapidly with oxygen, water, gas?

  Oxygen
• How does the electronic structure affect the reactivity of group 1?

  The outer electron moves further away from the nucleus - further it gets the less attracted the outer electron is to its positive nucleus.
• Are Group 7 all metals or non - metals ?

  Non-metals
• How many electrons does Group 2 have in its outer energy level?

  2
• What happens to Group 7 elements in order to achieve full outer energy level?

  Atoms react in order to achieve a full outer energy level.
• What are Group 7 also referred to?

  The Halogens
• What happens when Group 7/ the Halogens react with a non-metal?


  Form covalent bond and achieve full outer energy level.
• What happens when The Halogens react with metals?

  They form ionic compounds.
• What is an ion?

  An ion is an atom with an overall charge.
• Where do you find non-metals on the periodic table?


  the right side
• What happens when a Halogen reacts with a metal?

  The Halogen atom gains one electron and forms an ion with a -1 charge.
• How reactive are Group 1 ( the Alkali metals)?

  Highly reactive
• What are the properties of the Alkali metals?


  Soft, highly reactive, low melting points, low density and all form ions with 1+ charge
• What are the properties of transition element?


  Hard and strong, high melting points (except mercury) and less reactive than Group 1 metals.
• Like Group 1, Transition elements loose electrons to form ions with a positive charge but can form ions with different charges.
• Can Transition elements be used as a catalyst?

  Yes
• Do Transition elements form coloured compounds ?

  Yes
• What does displacement mean?


  When a more reactive element displaces (pushes out)a less reactive element from a compound that contains the less reactive element
• What is decomposition?


  A reaction in which a compound breaks does into 2 or more simpler substances.
• What is neutralisation?

  A reaction in which acids and gases of equal strength react with each other to form salt and water.
• What is precipation?


  A solid formed by a change in solution often due to a chemical reaction or change in temperature that decreases credibility of a solid.
• How were the early lists of elements on the periodic table ordered?

  By atomic mass
• Why did Mendeleev swap the order of some elements?

  to group them by their chemical properties
• Why are alkali metals called this?

  they metals that react with water to form an alkali