What is valency?

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Valency is a concept in chemistry that refers to the number of chemical bonds a particular element can form with other elements. Valency is defined as the maximum number of electrons that an atom of an element can acquire or lose, gain or share to form a chemical bond.

The valency of an element is used to predict the formula of a compound that can be formed by combining the element with other elements.
It helps to determine the type of chemical bond that is likely to form between the elements.
Valency plays a crucial role in chemical reactions and in the structure of molecules and compounds.

For example, the valency of carbon is 4, meaning it can form 4 chemical bonds with other atoms. This is why it is often found in molecules such as methane (CH₄) and ethane (C₂H₆).

The valency of oxygen is 2, so it can form 2 bonds, such as in water (H₂O).

Valency

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Atomic and Molecular Masses	Carbon and Its Compound	Find Atomic Mass
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Nucleus of an Atom Force	Structure of Atom	Periodic Classification of Elements

CBSE CLASS XII Related Questions

1.
Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

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2.
Vitamin $B_{12}$ is a complex compound of :

$Fe^{2+}$
$Mg^{2+}$
$Co^{3+}$
$Cu^{2+}$

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3.
What happens when acidic solution of potassium permanganate is allowed to stand for sometime ? Give the equation involved. What is this type of reaction called ?

View Solution

4.
Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

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5.
On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

Starch
Sucrose
Maltose
Cellulose

View Solution

6.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

View Solution

What is valency?

CBSE CLASS XII Related Questions

1.
Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

2.
Vitamin $B_{12}$ is a complex compound of :

3.
What happens when acidic solution of potassium permanganate is allowed to stand for sometime ? Give the equation involved. What is this type of reaction called ?

4.
Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

5.
On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

6.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

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What is valency?

CBSE CLASS XII Related Questions

1.Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

2.Vitamin $B_{12}$ is a complex compound of :

3.What happens when acidic solution of potassium permanganate is allowed to stand for sometime ? Give the equation involved. What is this type of reaction called ?

4.Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

5.On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

6.For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

2.
Vitamin $B_{12}$ is a complex compound of :

3.
What happens when acidic solution of potassium permanganate is allowed to stand for sometime ? Give the equation involved. What is this type of reaction called ?

4.
Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

5.
On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

6.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.