Question

explain formation of a sodium ion

Answer 1

we know that the number of atom of sodium is 11

so in outer shell the number of atom is 1 that 's why it leave it

so the ion of sodium is +

Answer 2

Answer:

Sodium ion- it has 1 valence electron so its easy for it to loose this electron.Thus, it forms sodium ion by loosing its valence elctron while reacting.It forms Na+. ... Oxide ion- it has 6 valence electrons so it gains 2 electrons lost by a metal atom and reacts with it.