Explain why the second ionisation energy of Magnesium is lower than the second ionisation energy of Sodium.
For the 2nd IE of Na an electron is being removed from the 2p subshell.For the 2nd IE of Mg an electron is being removed from the 3s subshell.It requires more energy to remove an electron from a lower energy shell. The shielding on the electron is greater in Mg+.
NR
Related Chemistry A Level answers
All answers ▸Why does phenol react more readily with bromine than benzene?
Why do the atomic radii of the elements decrease across Period 3 from sodium to chlorine?
The Haber process is used to produce ammonia. (Insert equation here) Explain the optimum conditions for this reaction and why these may differ from the conditions used in industry.
Describe the products of the following Friedl-Crafts substitution and explain the role of the AlCl3 in the reaction: C6H6 + CH3C(O)Cl + AlCl3 = ?