Question

do we need to write the valency with a positive or negative charge or just the number​

Answer 1

Answer:

we need to write the valency with a positive or a negative charge

It is compulsory to write the positivity or negativity of the charge.

Explanation:

Have a nice day my friend :)

Answer 2

Answer:

No….Valency doesn’t contain any sign is just combining capacity of an element.

OXIDATION NUMBER will contain sign because it shows loss or gain of electrons from element when element forms a compound.