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 ▸Why are the theoretical and Born Haber lattice enthalpies different?
Write the electronic configuration of the following using the orbital method: 4. N3- 5. Ar 6. Sc3+ 7. Mn2+ 8. Fe3+ 9. V3+
What is a chiral carbon and optical isomerism?
Why does the first ionisation energy generally increase across a period? Explain why there are dips in energy between groups 2 and 3 and groups 5 and 6?