Answer
Verified
482.7k+ views
Hint: Valency is the combining capacity of an element or we can say the number of hydrogen atoms it can displace or combine with. Transition metals like Iron (Fe) and Copper (Cu) show more than one valency in compound formation.
Complete step by step solution:
To find the valency we must need to know the electronic distribution of the given element.
For example, the atomic number of Oxygen is 8. And its electronic configuration is K=2, L=6.
You can see it has 6 electrons in its outermost shell and it needs two more electrons to complete its octet. So, its valency is 2.
Now in this case, chlorine has 7 valence electrons in its outermost shell and it needs 1 more electron to complete its octet.
But in \[FeC{{l}_{2}}\] , iron is combined with two chlorine atoms so it donates two electrons to two chlorine atoms.
Thus, the valency of Iron (Fe) here is 2.
Similarly, in the case of \[FeC{{l}_{3}}\], iron combines with three atoms of chlorine and each requires one electron to complete its octet. So, iron donates 3 electrons. One for each chlorine atom.
Thus, the valency of Iron (Fe) here is 3.
Therefore, the correct answer will be (c).
Note: Always remember valence electrons and valency is two different things. Valence electrons is the number of electrons present in the outermost shell. Whereas valency is the number of electrons an element can gain or lose to combine with another element.
For example:
Fluorine has 7 valence electrons. But its valency is 1 because it gains one electron to combine with other elements.
Complete step by step solution:
To find the valency we must need to know the electronic distribution of the given element.
For example, the atomic number of Oxygen is 8. And its electronic configuration is K=2, L=6.
You can see it has 6 electrons in its outermost shell and it needs two more electrons to complete its octet. So, its valency is 2.
Now in this case, chlorine has 7 valence electrons in its outermost shell and it needs 1 more electron to complete its octet.
But in \[FeC{{l}_{2}}\] , iron is combined with two chlorine atoms so it donates two electrons to two chlorine atoms.
Thus, the valency of Iron (Fe) here is 2.
Similarly, in the case of \[FeC{{l}_{3}}\], iron combines with three atoms of chlorine and each requires one electron to complete its octet. So, iron donates 3 electrons. One for each chlorine atom.
Thus, the valency of Iron (Fe) here is 3.
Therefore, the correct answer will be (c).
Note: Always remember valence electrons and valency is two different things. Valence electrons is the number of electrons present in the outermost shell. Whereas valency is the number of electrons an element can gain or lose to combine with another element.
For example:
Fluorine has 7 valence electrons. But its valency is 1 because it gains one electron to combine with other elements.
Recently Updated Pages
A particle is undergoing a horizontal circle of radius class 11 physics CBSE
A particle is thrown vertically upwards with a velocity class 11 physics CBSE
A particle is rotated in a vertical circle by connecting class 11 physics CBSE
A particle is projected with a velocity v such that class 11 physics CBSE
A particle is projected with a velocity u making an class 11 physics CBSE
A particle is projected vertically upwards and it reaches class 11 physics CBSE
Trending doubts
Find the value of the expression given below sin 30circ class 11 maths CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
In the tincture of iodine which is solute and solv class 11 chemistry CBSE
On which part of the tongue most of the taste gets class 11 biology CBSE
State and prove Bernoullis theorem class 11 physics CBSE
Who is the leader of the Lok Sabha A Chief Minister class 11 social science CBSE