Why does ice float on water?
When water freezes into ice, the H2O molecules form Hydrogen bonds between each other and arrange themselves into an open lattice structure. This causes the molecules in ice to be further apart from each other, when compared to water molecules. This means that ice is less dense than water, hence why it floats.
JC
Related Chemistry A Level answers
All answers ▸Elements in the Periodic Table often show periodic trends. Describe and explain the periodic trend in atomic radius and electronegativity from Na to Cl.
Compare the basic ability between ammonia, ethyl amine and phenyl amine.
Explain why the structure of benzene cannot be acurately described using Kekule's structure (cyclohexa-1,3,5-triene).
Giving the electronic configurations for each element, predict the trend in 1st ionisation energies going across period 2 from Lithium to Neon.