Respuesta :
Answer:
Bro I got notification of this question but soory I don't know the answer Hope you understand me
Answer :
Na valency 1
Explanation:
Na -sodium.
This element is in the 1A group, so it has 1 electron on the last (valent) level.
So, only 1 electron can participate in forming chemical bond, and therefore the valency of Na is 1.