Thermochemistry

Thermochemistry

1. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10

   • Expectations - Cu and Cr

2. Electronegativity - is defined as the measure of the attraction between a nucleus and a pair of bonded electrons.

   • The trend of electronegativity - electronegativity increases across the periodic table and is also highest at the top of the periodic table and decreases as it goes down the table
     • But why?
       • The first thing that is changing is the number of protons in the nucleus. As we go along the periodic table and down

3. First ionisation energy – amount of energy required to remove one valence electron from a mole of atoms when they are in a gas state. Unit kJ mol-1