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Flashcards

Atoms and Metals Quiz

Dale George Chemistry GCSE Inglês 46 flashcards

Flashcards do conjunto (46)

  1. 1Name the 3 sub atomic particlesPROTONS, NEUTRONS AND ELECTRONS
  2. 22. Which 2 are in the nucleus?PROTONS AND NEUTRONS
  3. 33. Which 2 are charged?(PROTONS AND ELECTRONS)
  4. 44. Where are the electrons?(IN SHELLS/ENERGY LEVELS ORBITING THE NUCLEUS)
  5. 55. What number on the periodic table tells you the number of protons?ATOMIC/PROTON NUMBER
  6. 66. What sum do you do to find the number of neutrons in an atom?MASS NUMBER- ATOMIC NUMBER
  7. 77. What is the symbol of limestone and what is it made of?CaC03
    (calcium carbonate)
  8. 88. Formula when limestone thermally decomposes?CaCO3 -> CaO + CO2
    (calcium oxide + carbon dioxide)
  9. 99. Formula when limestone reacts with sulphuric acid?CaCO3 + H2SO4 -> CaSO4 + CO2 + H2O (calcium sulphate + carbon dioxide + water)
  10. 1010. Formula when calcium oxide reacts with water?CaO + H2O -> Ca(OH)2
    (calcium hydroxide)
  11. 1111. What happens when calcium hydroxide reacts with C02?Calcium carbonate is produced
  12. 1212. What can limestone be used to make?Cement - powdered limestone + powdered clay
    Concrete - sand + aggregate
  13. 1313. Disadvantage of quarrying?1. Ugly holes made
    2. Processes like blowing up rock - noise and dust pollution
    3. Destroys habitats
    4. Transport from lorries - noise pollution
    5. Waste materials make unsightly tips
  14. 1414. Disadvantages of making stuff from limestone1. Cement factories - dust pollution causes breathing problems
    2. Energy needed to produce cement and quicklime from fossil fuels
  15. 1515. Uses and plus sides of limestones1. Provides housing and roads
    2. In dyes, paints and medicines
    3. Can be used to neutralise acidic soil
    4. Can neutralise sulphur dioxide
    5. Provides jobs
    6. Land is restored after quarrying
  16. 16Advantages of limestone1. Widely available and cheap
    2. Looks attractive
    3. Can be poured into moulds for concrete
    4. Doesn't rot like wood
    5. Can't be gnawed by insects
    6. Doesn't corrode like other metals
  17. 17What non metal element is used to displace a metal?CARBON
  18. 18Must the metal be more or less reactive than carbon?LESS
  19. 19What is an ore?ROCK CONTAINING ENOUGH METAL TO MAKE IT ECONOMICAL TO EXTRACT
  20. 20How do we extract metals which are more reactive than carbon?ELECTROLYSIS
  21. 21What are the 4 ions present when sodium chloride is electrolysed?Na+ Cl- H+ OH-
  22. 22Why does H+ go to the electrode instead of Na+?HYDROGEN IS LESS REACTIVE
  23. 23Why are alloys stronger than pure metals?THE LAYERS CANNOT SLIDE OVER EACHOTHER
  24. 24What is meant by native state?WHEN UNREACTIVE ELEMENTS ARE FOUND AS THE METAL ITSELF
  25. 25What is produced when iron oxide is displaced in the blast furnace?CARBON DIOXIDE + IRON
  26. 26Why are metals extracted my electrolysis so expensive?THE PROCESS USES LARGE AMOUNTS OF ENERGY
  27. 27As copper-rich ores are running out, we need to extract from low grade ores. Give two ways we do this?BIO-LEACHING AND PHYTOMINING
  28. 28Give two reasons we should recycle metalsEXTRACTION USES ENERGY, EXTRACTION USES LIMITED RESOUCRES, EXTRACTION DAMAGES THE ENVIRONMENT
  29. 29What is wrong with iron from the blast furnace?CONTAINS IMPURITIES WHIC MAKE IT BRITTLE
  30. 30What is an alloy?MIXTURE OF ELEMENTS WHERE AT LEAST ONE IS A METAL
  31. 31Why are most metals alloys?PURE METALS ARE TOO SOFT
  32. 32What are the metals between groups 2 and 3 in the periodic table called?TRANSITION ELEMENTS
  33. 33Why are aluminium and titanium so usefulTHEY HAVE LOW DENSITY AND ARE RESISTANT TO CORROSION
  34. 34What does phytomining use to extract metals?PLANTS
  35. 35What are the stages of phytominingPLANTS ABSORB COPPER. PLANTS ARE THEN BURNED TO PRODUCE ASH CONTAINING THE COPPER COMPOUND. THE COPPER IS THEN EXTRACTED
  36. 36What are the stages of bio-leaching?BACTERIA USES ENERGY FROM BONDS IN THE COMPOUND TO SEPARATE FROM THE ORE. LEACHATES HAVE COPPER WHICH CAN BE EXTRACTED
  37. 37What is produced when carbonates react with acid?CO2, SALT AND WATER
  38. 38What is smelting?When the ore is heated in a furnace
  39. 39Why is more copper being extracted from ores with low percentage of copper compounds?- It is more economical to do so
    - Copper ores are running out
    - There are not many high grade ores available
  40. 40Why is the overall charge of an atom neutral?Amount of electrons = amount of protons
  41. 41Why are some elements in the same group?They have the same number of electrons in the outer shell
    Similar properties
  42. 42Why are noble gases in Group 0 unreactive?They have a stable arrangement of electrons
  43. 43Why is scrap iron used to displace copper?It is more reactive
    Cheaper alternative
  44. 44Feature of low carbon steel?Easily shaped
  45. 45Feature of high carbon steel?Are hard
  46. 46Feature of stainless steelResistant to corrosion

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Descrição
Some questions on C1 for revision
Criado por
Dale George
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