Question

how to find the valency of first 30
elements​

Answer 1

HI there !!

1) Hydrogen (H) Valency = 1 2)Helium (He) Valency = 0 3)Lithium(Le)4)Beryllium(Be)

Valency = 2

Valency = 25)Boron(B)

Valency = 3

Valency = 36)Carbon(C)

Valency = 4

Valency = 47)Nitrogen(N)

Valency = 3

Valency = 38)Oxygen(O)

Valency = 2

Valency = 29)Fluorine

Valency = 1

Valency = 110)Neon (Ne)

Valency = 0

Valency = 011)Sodium(Na)

Valency = 1

Valency = 112) Magnesium(Mg)

Valency = 2

Valency = 213) Aluminium(Al)

Valency = 3

Valency = 314) Silicon(Si)

Valency = 4

Valency = 415) Phosphorus(P)

Valency = 5 , 3

Valency = 5 , 316) Sulphur(S)

Valency = 2

Valency = 217) Chlorine(Cl)

Valency = 1

Valency = 118) Argon(Ar)

Valency = 0

Valency = 019) Potassium(K)

Valency = 1

Valency = 120) Calcium (Ca)

Valency = 2

Valency = 221) Scandium (Sc)

Valency = 3

Valency = 322) Titanium (Ti)

Valency = 4

Valency = 423) Vanadium (V)

Valency = 5 , 4

Valency = 5 , 4 24) Chromium (Cr)

Valency = 2

Valency = 225)Manganese(Mn)

Valency = 7 , 4 , 2

Valency = 7 , 4 , 226)Iron (Fe)

Valency = 2 , 3

Valency = 2 , 327) Cobalt (Co)

Valency = 3 , 2

Valency = 3 , 228)Nickel (Ni)

Valency = 2

Valency = 229)Copper (Cu

Valency = 2 , 1

Valency = 2 , 130)Zinc(Zn)

Valency = 2

Answer 2

Answer:

to find valency of an element-

if it is a metal has 1, 2 , 3 , 4 electrons in its outer most shell then it's valency will be 1, 2, 3,4

for w

ex lithium has electrical configuration 2,1 then it's valence is 1

if it is a non metal or it's outermost shell have 5, 6, 7 then yoy will subtract from 8

for ex oxygen it's configuration 2, 6

it's valency 8-6=2

.....HOPE it will be helpful