Question

What are the ions present in NA2O and MGO
and please explain how to find it .

Answer 1

The ions present in Na2O are 2Na+ and O-

electronic configuration of

sodium(Na) is 2,8,1

Oxygen(O) is 2,6

oxygen needs two electron to attain nearest noble gas formation. sodium want to loss one electron to get a completely filled outer shell.

so, two atoms of sodium losses one electron each to oxygen atom. This lead to the formation of Na2O.

since, sodium losses electron it is positively charged ion(proton number increases). And oxygen gains electron so it gets negatively charged(electron number increases).

similarly, in MgO

•Mg is positive ion

•O is negative ion

Mg has 2,8,2 as its electronic configuration. so unlike Na, one atom of Mg is capable of providing two electron to oxygen.

To find the ions, just keep in mind the atom which provide electrons (mostly metals) are positively charged. Atoms that gain electrons (non metals) are negatively charged.