Chemistry unit 1

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Author:
Sylver
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213840
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Chemistry unit 1
Updated:
2013-04-16 01:58:14
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Chem
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Chemistry for dummies
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  1. What is the relative Charge of Proton?
    1+
  2. What is the relative charge of Electron?
    1-
  3. What is the relative charge of Neutron?
    0
  4. What is the relative mass of Electron?
    1/2000
  5. Define Isotopes.
    Atoms of same element with different numbers of neutrons.
  6. Define relative Isotopic mass.
    the mean mass of an atom of an isotope compared with 1-12th if the mass of an atom of C-12.
  7. Define relative atomic mass ().
    The weighted mean mass of an atom of an element compared to 1-12th of the mass of an atom of C-12.
  8. Define the mole.
    amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the C-12 isotope.
  9. Molar mass(M)
  10. define molecule.
    small group of atoms held together by covalent bond
  11. n= 
    24
  12. n=
    24 000
  13. Define RTP.
    Room temperature and Pressure
  14. At RTP one mole of gas occupies how much space?
    24 
  15. n= concentration x ?
    Volume
  16. n=  ?? x 
    • ?=1000
    • ??= Concentration
  17. What is the Formulae for Sulphuric Acid?
  18. What is the Formulae for Hydrochloric acid?
    HCL
  19. What is the formulae for Nitric Acid?
  20. define base.
    a species that is a proton acceptor.
  21. define acid.
    A species that's a proton donor
  22. define Alkali.
    Type of base that dissolves in water to form  hydroxide ions (OH)
  23. Define Salt.
    a compound which is formed when the hydrogen ion from an acid has been replaced by a metal ion or another positive ion.
  24. acid + base =
    salt + water
  25. acid + alkali =
    salt + water
  26. acid + carbonate =
    Salt + water + 
  27. define cation.
    positively charged ion.
  28. define anion.
    negatively charge ion.
  29. define Anhydrous.
    A substance containing no water molecule
  30. define Hydrated.
    Crystalline compound containing water molecule.
  31. what is the oxidation state of each element in ?
    • N=-3
    • H=+1
  32. What's the oxidation state of nitrogen in: -  and ?
    • N=+1
    • N=+5
  33. define redox reaction.
    a reaction which both reduction and oxidation take place.
  34. define reduction.
    gain of electrons
  35. define oxidation.
    loss of electrons
  36. metal + acid =
    Salt + 

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