Question

what is valency and Ion of sodium​

Answer 1

HEYA ❣️

VALENCY OF SODIUM → +1

ION OF SODIUM → NA¹+

Answer 2

Of electrons in outer shell are called valence electrons and same is the valency. Here no. of electrons in outer orbital is 1 so the valency of sodium is 1. If you are talking about the sodium ion, which is represented by Na+, then it has a valency of +1, having lost an electron.