Which one of the following is correct order of increase of size?
a)Mg < Na+< F- < Al b)Na+ < Al < Mg < F- c)Na+ < F-< Al < Mg d)Na+ < F- < Mg < Al
Na+ < F-< Al < Mg is the order of increase in size.
Al and Mg have 3 shells while Na+ and F- have two shells. Size decrease on moving left to right across a period so Mg> Al
Na+ and F- are isoelectronic but in case of Na+ there are 11 protons while F- has 9. The high effective nuclear charge make Na+ smaller.
Al and Mg have 3 shells while Na+ and F- have two shells. Size decrease on moving left to right across a period so Mg> Al
Na+ and F- are isoelectronic but in case of Na+ there are 11 protons while F- has 9. The high effective nuclear charge make Na+ smaller.