Question

Визначте валентність елементів у формулах: Na 2 O, SO 3 , P 2 O 3 , CuO, As 2 O 5 , FeO, SiO 2 , HCl, NH 3 , ZnCl 2 , MgO, PH 3 . помогите

Answer 1

Ответ:

l ll

Na2O

ll

SO3

lll ll

P2O3

l ll

CuO

As2O5 As = 5, O = 2

FeO Fe = 2, O = 2

-

HCl H = 1, Cl = 1

NH3 N = 3, H = 1

-

MgO Mg = 2, O = 2

PH3 P = 3, H = 1