Describe the trend in ionisation energies down group 1.
Ionisation energies decrease going down group 1, firstly since the number of shells in the atom increases so the atomic radius is increased. There are also more electrons between the positively charged nucleus and outer electron causing increased shielding. These decrease the nuclear attraction to the outer electron so less energy is required to remove it.
Related Chemistry A Level answers
All answers ▸How can an aldehyde be distinguished from a ketone?
Describe and explain the electrical conductivity of lithium oxide, Li2O, and lithium in their solid and molten states.
Describe the bonding in, and the structure of, sodium chloride and ice. Explain why they have very different melting points.
Explain the position and numbering system of elements on the periodic table.