What is the electronic configuration for the sodium ion, Na+ ?
1s2 2s2 2p6
Na+ has +1 positive charge and therefore it has lost an electron.It loses its one electron in its 3s orbital as that electron is at the highest energy - highest energy electrons are the first to be lost.
Related Chemistry A Level answers
All answers ▸Give the IUPAC name of CH3CH2CH2CH2CH(OH)CN
Explain the trend in first ionization energy down group 2. (3 marks)
Giving the electronic configurations for each element, predict the trend in 1st ionisation energies going across period 2 from Lithium to Neon.
The boiling point of the halogen elements increase down the group from chlorine to bromine to iodine. Please explain this trend for 3 marks.