Electrongeativity

To effectively teach topic 3.2 (Physical trends) of the Periodicity unit, you need to introduce the students to the concept of electronegativity. In order to assist your teaching, the following video may help. You should also emphasize to the students that electronegativity is only found in covalent bonding (and not the common misconception, that it is found in all bonds). OgAEnuYKcPg

Water (5)

Tuesday was World Water Day 2011 and the theme for this year was ‘Water for Cities’. The theme for this weeks blogs posts will therefore be all about water. So far, we have been focusing on the fact that water has a much higher boiling point than is predicted and that the reason could be pinned down to electronegativity.   Image kindly reproduced according to the licence at: http://en.wikipedia.org/wiki/File:3D_model_hydrogen_bonds_in_water.jpg You may also remember that yesterday I posted a question asking: ‘What causes electronegativity?’ Well, electronegativity is caused by ...

Water (4)

Tuesday was World Water Day 2011 and the theme for this year was ‘Water for Cities’. The theme for this weeks blogs posts will therefore be all about water. So far, we have been focussing on the fact that water has a much higher boiling point than is prediced and that the reason could be pinned down to the hydrogen bond. By Bidgee (Own work) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons  You may also remember that yesterday I posted a question asking: 'How ...