How do atomic radii of transition elements in a given series vary with

1.	How do atomic radii of transition elements in a given series vary with increase in atomic number? What is your observation on atomic radii of 4d and 5d series of transition elements? Discuss the phenomenon involved, if any.
Answer» The 4d and 5d series of transition elements in each group have the same atomic radii. This is due to lanthanide contraction. The steady decrease in the size of the atoms or ions from lanthanum to lutetium is known as lanthanide contraction. As the atomic number increases in the lanthanide series, the new electron goes to the inner 4f orbitals. The shielding effect of a 4f electron is poor. As a result, the attraction of the outer electrons by the nucleus increases and this tends to a decrease in the size.

How do atomic radii of transition elements in a given series vary with increase in atomic number? What is your observation on atomic radii of 4d and 5d series of transition elements? Discuss the phenomenon involved, if any.

Answer»

The 4d and 5d series of transition elements in each group have the same atomic radii. This is due to lanthanide contraction.

The steady decrease in the size of the atoms or ions from lanthanum to lutetium is known as lanthanide contraction.

As the atomic number increases in the lanthanide series, the new electron goes to the inner 4f orbitals. The shielding effect of a 4f electron is poor. As a result, the attraction of the outer electrons by the nucleus increases and this tends to a decrease in the size.

Discussion

No Comment Found

Related InterviewSolutions

What were the two main occupations of the Rig Vedic Aryans?
Name the two political institutions which exercised check on the powers of the King in the Rig Vedic period.
What w’as the position of women in the Rig Vedic age ?
Describe the social life of the Rig Vedic Aryans with reference to the following: (a) The Family Structure (b) Position of Women (c) Varna System
With reference to the following explain the main features of the Rig Vedic Economy: (a) Agriculture (b) Domestication of Animals (c) Trade Transactions, Crafts and Transportation
Mention any two archaeological sources to reconstruct the later Vedic Age.
Mention any two of the Ashrams in the life of a man in Aryan society.
What information do we gather from the later Vedic literature in respect of: (a) Spread of Vedic Civilization to many New Regions. (b) Role of Iron in later Vedic Economy.
Mention briefly the rituals and sacrifices of the later Vedic Aryans?
What is the message of the Bhagavad Gita?