Which of the following pair of elements will show valency = 3A P and N B S and Cl C O and F D F and I
Question
Which of the following pair of elements will show valency = 3A P and N B S and Cl C O and F D F and I
Solution
The valency of an element is determined by the number of electrons in the outermost shell of its atoms. It is the combining capacity of an element.
A. P (Phosphorus) and N (Nitrogen) Phosphorus (P) has 5 electrons in its outermost shell and Nitrogen (N) has 5 electrons in its outermost shell. So, their valency is not 3.
B. S (Sulfur) and Cl (Chlorine) Sulfur (S) has 6 electrons in its outermost shell and Chlorine (Cl) has 7 electrons in its outermost shell. So, their valency is not 3.
C. O (Oxygen) and F (Fluorine) Oxygen (O) has 6 electrons in its outermost shell and Fluorine (F) has 7 electrons in its outermost shell. So, their valency is not 3.
D. F (Fluorine) and I (Iodine) Fluorine (F) has 7 electrons in its outermost shell and Iodine (I) has 7 electrons in its outermost shell. So, their valency is not 3.
Therefore, none of the given pairs of elements have a valency of 3.
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