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Tuesday 19 January 2010

Random Chem Unit 1 Notes.

Group 1+2= metals.

Sodium has a lower BP (boiling point) then Magnesium,astheyare both metallic, but sodium only puts one electron into the delocalised sea, but Mg puts in two, and also Mg's are smaller,and easier for the electrons to attract together, so it therefore, has bigger electrostatic forces, and the melting point is higher.

When drawing Hydrogen bonds:
  • Lines must be straight.
  • All dipoles must be shown.
  • Must have the correct amount of lone pairs drawn on.

Ethanol: C2H6O

If it says economic reasons, looking for something about 'efficiency'.

Structural Isomer: Same formulae,but the atoms are arranged differently.

Thoughts?

Nin.

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