Question

one atom of Na, chemically combines with one atom of H then what it gives and Na valency and How ?

Answer 1

Na + H2 gives you a reduction process where hydrogen is added to an element.

Answer 2

it gives sodium hydroxide ........
valency= 1
because by filling the shells we get
2,8,1
now it losss 1 electron fromhis octet shell and got 1 valency
plsssss mark it brainlist if u like this because i told u all concept of valencies in one answer only