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 ▸Describe why phenol reacts more readily with bromine than benzene does.
State how you would test a solution for the presence of sulfate ions? Explain, using an ionic equation, what you would expect to observe in the presence of sulfate ions.
Phosphorus is burned in air at 500 ºC to produce gaseous phosphorus(V) oxide. 220 g of phosphorus was reacted with an excess of air. Calculate the volume, in m3, of gaseous phosphorus(V) oxide produced
An acid can be either strong or weak, explain the difference between strong and weak acids.