Dot-&-Cross diagram of Urea (Chemistry 'O' Level Qn)

• UltimaOnline

  20 Oct 08, 11:40

  Draw the Dot-&-Cross diagram of Urea (Chemistry 'O' Level Qn), given that urea is CO(NH2)2.

   

   

• UltimaOnline

  20 Oct 08, 11:49

  

   

  So your diagram should have :

  between O and C, double bond, so "xoxo"

  between C and each N, single bond, so "xo"

  between N and each H, single bond, so "xo"

  make sure your O has two lone pairs, ie. "xx" and "xx" (not bonded with C)

  make sure your N has one lone pair, ie. "xx" (not bonded with H or C)

  check that total no. of valence electrons (both bond pairs and lone pairs) = 12 pairs = 24 valence electrons

   

   

• eagle

  20 Oct 08, 11:51

  We love chemistry

• Garrick_3658

  20 Oct 08, 12:18

  Last min knowledge sharing arrr

  Thanks! :D