The properties which increase on going down the group are__________.
The properties which increase on going down the group are__________.
The correct option is D metallic character and reducing power
Explanation for correct answer
D) Metallic character and reducing power
1. Metallic character or metallic nature is the tendency to lose electrons by an atom. In a group from top to bottom: As the size of an atom increases, the distance between the nucleus and the valence electron increases and the nuclear attraction decreases. The nucleus power cannot reach the outermost electron effectively thus metallic character or electro positivity increases.
2.Reducing power : An element loses electrons and undergoes oxidation thus, helping the other atom to undergo reduction. Such capacity of an atom is called reducing power. In a group, with increase in atomic size and metallic nature reducing power increases .
Explanation for Incorrect answer :
In a group from top to bottom: Reducing power increases due to the increase in the atomic size of elements and also decrease in the nuclear attraction to the valence electron.
B) Atomic size increases from top to bottom and decreases from left to right due to the increase in the number of shells and increase in the nuclear charge respectively.
A) Ionization energy and electronegativity decreases down the group and increases from left to right as they are inversely proportional to atomic size.
C)Electronegativity decreases down the group due to the decrease in nuclear attraction and the increase in atomic size.
Hence,D) is the correct option- metallic character & reducing power increases in a group from top to bottom.
metallic character and reducing power
Explanation for correct answer
D) Metallic character and reducing power
1. Metallic character or metallic nature is the tendency to lose electrons by an atom. In a group from top to bottom: As the size of an atom increases, the distance between the nucleus and the valence electron increases and the nuclear attraction decreases. The nucleus power cannot reach the outermost electron effectively thus metallic character or electro positivity increases.
2.Reducing power : An element loses electrons and undergoes oxidation thus, helping the other atom to undergo reduction. Such capacity of an atom is called reducing power. In a group, with increase in atomic size and metallic nature reducing power increases .
Explanation for Incorrect answer :
In a group from top to bottom: Reducing power increases due to the increase in the atomic size of elements and also decrease in the nuclear attraction to the valence electron.
B) Atomic size increases from top to bottom and decreases from left to right due to the increase in the number of shells and increase in the nuclear charge respectively.
A) Ionization energy and electronegativity decreases down the group and increases from left to right as they are inversely proportional to atomic size.
C)Electronegativity decreases down the group due to the decrease in nuclear attraction and the increase in atomic size.
Hence,D) is the correct option- metallic character & reducing power increases in a group from top to bottom.
