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 ▸What's added to Ethanoyl Chloride to make Methyl Ethanoate? Draw out the mechanism for this reaction. Why is this preferred to esterification?
Why does phenol readily undergo electrophilic substitution but benzene does not without the aid of a catalyst?
Describe the shape of and bonding in a molecule of benzine. Explain why benzene doesn't readily undergo reactions.
Explain the polarity of both CH3CH2Br and CBr3CBr3.