Question

What is valency ? Give the valency of first 30 elements.

Answer 1

Valency => The Element Which Reacts With Other Element According To It's Combining Capacity Is Known As Valency .

Valency Of 30 Elements =

1 . Hydrogen[H]-valency- 1

2 . Helium[He]-valency-0[noble gas]

3 . Lithium[Li]-valency-1

4 . Beryllium[Be]-valency-2

5 . Boron[B]-valency-3

6 . Carbon[C]-valency-4

7 . Nitrogen[N]-valency-3

8 . Oxygen[O]-valency-2

9 . Fluorine[F]-valency-1

10 . Neon[Ne]-valency-0[noble gas]

11 . Sodium[Na]-valency-1

12 . Magnesium[Mg]-valency-2

13 . Aluminium[Al]-valency-3

14 . Silicon[Si]-valency-4

15 . Phosphorus[P]-valency-3

16 . Sulphur[S]-valency-2

17 . Chlorine[Cl]-valency-1

18 . Argon[Ar]-valency-0[noble gas]

19 . Potassium[K]-valency-1

20 . Calcium[Ca]-valency-2

21 . Scandium (Sc)-Valency-3

22. Titanium (Ti)-Valency-4

23 . Vanadium (V)-Valency-5 , 4

24 . Chromium (Cr)-Valency-2

25 . Manganese(Mn)-Valency-7 , 4 , 2

26 . Iron (Fe)-Valency-2 , 3

27 . Cobalt (Co)-Valency-3 , 2

28 . Nickel (Ni)-Valency-2

29 . Copper (Cu)-Valency-2 , 1

30 . Zinc(Zn)-Valency-2

Answer 2

$Hey\:!!..$

The answer goes here...

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What is valency ?

Valency is the combining capacity of an element.

How to find valency of an element ?

In order to find the valency of a metal, count the number of electrons in it's outermost shell.

While to find the valency of non metal, subtract the number of electrons in it's outermost shell from eight.

Valency of first 30 elements are -

$\begin{tabular}{c | c | l}Element & Atomic Number & Valency \\ \cline {1-3} Hydrogen & 1 & 1 \\ Helium & 2 & 0 \\ Lithium & 3 & 1 \\ Beryllium & 4 & 2 \\ Boron & 5 & 3 \end {tabular}$

$\begin {tabular}{c | c | l}Element & Atomic Number & Valency \\ \cline {1-3}Carbon & 6 & 4 \\ Nitrogen & 7 & 3 \\ Oxygen & 8 & 2 \\ Fluorine & 9 & 1 \\ Neon & 10 & 0\end{tabular}$

$\begin{tabular}{c | c | l}Element & Atomic Number & Valency \\ \cline {1-3}Sodium & 11 & 1 \\ Magnesium & 12 & 2 \\ Aluminium & 13 & 3 \\ Silicon & 14 & 4 \\ Phosphorus & 15 & 5,3 \end{tabular}$

$\begin{tabular}{c | c | l}Element & Atomic Number & Valency \\ \cline {1-3}Sulphur & 16 & 2 \\ Chlorine & 17 & 1 \\ Argon & 18 & 0 \\ Potassium & 19 & 1 \\ Calcium & 20 & 2 \end{tabular}$

$\begin{tabular}{c | c | l}Element & Atomic Number & Valency \\ \cline {1-3}Scandium & 21 & 3 \\ Titanium & 22 & 4 \\ Vanadium & 23 & 5,4 \\ Chromium & 24 & 2 \\ Manganese & 25 & 7,4,2 \end{tabular}$

$\begin{tabular}{c | c | l}Element & Atomic Number & Valency \\ \cline {1-3}Iron & 26 & 2,3 \\ Cobalt & 27 & 3,2 \\ Nickel & 28 & 2 \\ Copper & 29 & 2,1 \\ Zinc & 30 & 2 \end {tabular}$

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