Why does the atomic radius decrease as you move along a period.
As you move along the period the proton number increases and the electrons are added to the same shell meaning no extra electron shielding occurs. Therefore the nuclear attraction to the outer most electron increases across the group and therefore the atomic radius decreases.
TM
Related Chemistry A Level answers
All answers ▸State and explain the trend in melting points of diamond, iodine and hydrogen fluoride.
Explain why adding small amounts of acid or base hardly changes the pH of an acidic buffer solution.
Draw the mechanism for the reaction between ethanoyl chloride and a nucleophile
How does Le Chatelier's Principle allow you to predict the change of the position of equilibrium for an equilibrium reaction?