Why do melting points decrease down group I?
As we go down group I, the ions have larger shells and the distance between the bonding electrons and positive nucleus decreases. This decreases the overall attraction forces between the two in metal lattices.
CW
Related Chemistry GCSE answers
All answers ▸Technetium is an element commonly used in medicine. A technetium atom is represented as ^99 _43 Tc. Give the number of protons, neutrons and electrons in this atom of technetium.
Calculate the relative formula mass of water.
Why can metals conduct electricity?
Balance the equation C4H8 + O2 ->CO2 + H2O