Answer
Verified
394.8k+ views
Hint: Lanthanides are also called ad f-block elements. The common electronic configuration of lanthanides is \[4{{f}^{1-14}}5{{d}^{0-1}}6{{s}^{2}}\]. Sometimes the electrons may enter into 5d orbital to get a full filled or half-filled electron configuration in 4f orbital.
Complete step by step answer:
We know that Gadolinium is a chemical element with the symbol Gd belonging to f-block.
The atomic number of gadolinium is 64.
It is a silvery-white, soft, ductile metal.
Gadolinium is found in nature only in combined form with other chemical elements.
The general electronic configuration of Gd is [Xe]\[4{{f}^{8}}5{{d}^{0}}6{{s}^{2}}\].
As per above electronic configuration in f-orbital first seven electrons occupies all the seven orbitals and the 8th electrons starts pairing with any one of the electrons in 7 degenerate orbitals of 4f orbital.
We know that if any element has half or fully filled electrons in their outermost orbital then the element is more stable.
Due to the above reason f-block elements like Gadolinium shows an half-filled electronic configuration by sending the 8th electron in 4f orbital to 5d orbital and looks like as follows.
Therefore, the outer electronic configuration of Gadolinium metal is [Xe]\[4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\].
So, the correct answer is “Option D”.
Note: Electronic configuration of Gadolinium metal is [Xe] \[4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\] instead of [Xe]\[4{{f}^{8}}5{{d}^{0}}6{{s}^{2}}\].
This half-filled electronic configuration of 4f-orbital makes Gadolinium metal as exceptionally stable.
Gadolinium loses three electrons very easily, 2 electrons from 6s orbital and one electron from 5d orbital. The stable oxidation state of gadolinium is +3.
Complete step by step answer:
We know that Gadolinium is a chemical element with the symbol Gd belonging to f-block.
The atomic number of gadolinium is 64.
It is a silvery-white, soft, ductile metal.
Gadolinium is found in nature only in combined form with other chemical elements.
The general electronic configuration of Gd is [Xe]\[4{{f}^{8}}5{{d}^{0}}6{{s}^{2}}\].
As per above electronic configuration in f-orbital first seven electrons occupies all the seven orbitals and the 8th electrons starts pairing with any one of the electrons in 7 degenerate orbitals of 4f orbital.
We know that if any element has half or fully filled electrons in their outermost orbital then the element is more stable.
Due to the above reason f-block elements like Gadolinium shows an half-filled electronic configuration by sending the 8th electron in 4f orbital to 5d orbital and looks like as follows.
Therefore, the outer electronic configuration of Gadolinium metal is [Xe]\[4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\].
So, the correct answer is “Option D”.
Note: Electronic configuration of Gadolinium metal is [Xe] \[4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\] instead of [Xe]\[4{{f}^{8}}5{{d}^{0}}6{{s}^{2}}\].
This half-filled electronic configuration of 4f-orbital makes Gadolinium metal as exceptionally stable.
Gadolinium loses three electrons very easily, 2 electrons from 6s orbital and one electron from 5d orbital. The stable oxidation state of gadolinium is +3.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Summary of the poem Where the Mind is Without Fear class 8 english CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Write an application to the principal requesting five class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE