1. Why does the first ionisation energy of atoms generally increase across a period?

As you go across the period, the number of protons increases, however the amount of shielding stays the same, so attraction of outer electrons to nucleus increases and more energy is required to remove an electron. Hence the ionisation energy increases.

Answered by Safia A. Chemistry tutor

3719 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Explain why compounds of Fe^2+ are coloured in solution. (4 marks)


What is entropy and how is it used in chemistry?


Describe a two step reaction route that can convert 1-Butene (CH2CHCH2CH3) into a compound that is more soluble in water. Use mechanisms to aid your answer (HINT: one of the steps involves nucleophilic substitution)


When going down group 1 on the periodic table, what happens to reactivity?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences