What is periodicity?
Periodicity is the trend in chemical and physical properties of the elements across each period of the periodic table.All elements in a period have the same number of shells, all elements in a group have the same number of electrons in their outer shells.Atomic radius decreases across a period and ionisation energy increases.However, there is a drop in ionisation energy between groups 2&3 and 5&6
JA
Related Chemistry A Level answers
All answers ▸What is the trend in ionization energy across period 3 in the periodic table?
How can I use an infrared spectrum with a mass spectrum to identify an unknown compound?
The pH of pure water can vary depending on the temperature it is held at. Does that mean pure water can be acidic or alkaline?
Describe the bonding in, and the structure of, sodium chloride and ice. Explain why they have very different melting points.