what is electronegativity and explain the trend in electronegativity as we go down the group?
Electronegativity is the power of an atom to attract electrons in a covalent bond towards itself. As we go down the group, electronegativity decreases because the atomic radii increases. The atomic radii increases because the number of electron shells increases. The nucleus is further away from the bonding pair of electrons and therefore it is less able to attract it.
Related Chemistry A Level answers
All answers ▸How does the first ionization enthalpy change down group 2?
How do I predict the shape of a molecule?
In terms of Electrostatic Forces, Suggest why the ‘Electron Affinity’ of Fluorine has a Negative value.
The enthalpy of combustion of ethanol is −1371 kJ mol−1 . The density of ethanol is 0.789 g cm−3 . Calculate the heat energy released in kJ when 1 dm3 of ethanol is burned.