Explain why the atomic radii of the elements decrease across Period 3 from sodium to chlorine
As you go across the period from sodium to chlorine, the number of protons in the nucleus increase.As protons are positively charged, they attract the outer electrons; as the number of protons increase, the attraction is greater and therefore the radius decreases.
EC
Related Chemistry A Level answers
All answers ▸Describe the Kekule and delocalised model of benzene and explain some of the reasons why the kekule is disproved
Explain the trend in Ionisation energy when moving across a period and down a group
Order the relative base strength of phenyl amine, methyl amine and methylphenyl amine and outline your reasoning.
How to calculate acidic buffer solution pH, and how do they behave?