Periodicity
What is Periodicity?
Periodicity refers to the repeating trends in physical and chemical properties of elements across periods and down groups in the periodic table. Periodic trends include atomic radius, ionisation energy, electron affinity, and electronegativity. These trends arise from the systematic increase in atomic number and the periodic filling of electron shells. Recognising periodicity allows prediction of element properties before direct measurement.
Key Facts
Frequently Asked Questions
Periodicity refers to the repeating trends in physical and chemical properties of elements across periods and down groups in the periodic table. Periodic trends include atomic radius, ionisation energy, electron affinity, and electronegativity. These trends arise from the systematic increase in atomic number and the periodic filling of electron shells. Recognising periodicity allows prediction of element properties before direct measurement.