Question

valencies of hydrogen, sodium, chlorine, potassium, silver, iodine

Answer 1

Hydrogen => +1
Sodium => +1
Chlorine => +1
Potassium => +1
Silver => +1
Iodine => -1

Hope it helps^_^

Answer 2

valency of Hydrogen is 1
sodium =1
chlorine = -1
potassium =1
silver =1
iodine = -1