Describe and explain the trend in atomic radii across the periodic table

Atomic radii decreases in size, moving from left to right in the periodic table.
This is because atoms on the right hand side of a period have a larger number of protons. So, there is a greater positive charge for atoms on the right hand side, like Neon with which to attract negative electrons. This causes the electrons to be pulled in with more force towards the nucleus, decreasing the radius.

Related Chemistry A Level answers

All answers ▸

Explain what happens to a crystal of iodine when it is heated (5marks)


What happens to a primary secondary and tertiary alcohol when an excess solution of Potassium Dichromate is added under acidic conditions, state the chemical formula of potassium dichromate?


How does increasing/decreasing temperature affect the equilibrium position of the following reaction: CuSO4.5H2O(s) ⇌ CuSO4(s) + H2O(l) ?


Pure water has a boiling point of 100 °C and a freezing point of 0 °C. What is the boiling point and freezing point of a sample of aqueous sodium chloride?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences