Question

write the valence electron and valency of first 30 elements

Answer 1

hydrogen. 1

helium. 2
lithium. 2,1
berellium2,2
boron. 2,3
carbon. 2,4
nitrogen. 2,5
oxygen. 2,6
florine. 2,7
neon. 2,8
sodium. 2,8,1
magnesium2,8,2
aluminium2,8,3
silicon2,8,4
phosphorus2,8,5
sulpher2,8,6
chlorine2,8,7
argon2,8,8
potassium2,8,8,1
calcium2,8,8,2
scandium2,8,8,3
titanium2,8,8,4
.vanadium2,8,8,5
chromium2,8,8,6
mangnese2,8,8,7
iron2,8,8,8
cobalt2,8,8,8,1
nickle2,8,8,8,2
copper2,8,8,8,3
zinc2,8,8,8,4

Answer 2

$\huge\mathfrak\red{Answer :}$


$\huge\textbf{ Valency :}$


Valency tells us how many electrons does an atom need to loose, gain and share to attain a stability to form a compound.

$\textbf{Valency of First 30 elements are :}$

1) Hydrogen (H) :- +1

2) Helium (He) :- 0

3) Lithium (Li) :- +1

4) Beryllium (Be) :- +2

5) Boron (B) :- +3

6) Carbon (C) :- ±4

7) Nitrogen (N) :- -3

8) Oxygen (O) :- -2

9) Fluorine (F) :- -1

10) Neon (Ne) :- 0

11) Sodium (Na) :- +1

12) Magnesium (Mg) :- +2

13) Aluminium (Al) :- +3

14) Silicon (Si) :- ±4

15) Phosphorus (P) :- -3,-5

16) Sulphur (S) :- -2

17) Chlorine (Cl) :- -1

18) Argon (Ar) :- 0

19) Potassium (K) :- +1

20) Calcium (Ca) :- +2

21) Scandium (Sc) :- +3

22) Titanium (Ti) :- +4

23) Vanadium (V) :- +5

24) Chromium (Cr) :- +2, +3, +6

25) Manganese (Mn) :- +2, +4, +7

26) Iron (Fe) :- +2, +3

27) Cobalt (Co) :- +2

28) Nickel (Ni) :- +2, +3

29) Copper (Cu) :- +1, +2

30) Zinc (Zn) :- +2

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