Answer
Verified
422.1k+ views
Hint: The electron configuration of Fe can be determined by the Aufbau principle, which basically gives us the idea of subshells in which electrons are present. And also tells us about the energies and shape of that subshells.
Complete Solution :
- As we know that iron is a transition metal. It basically follows the Aufbau principle of the filling of the atomic orbitals.
- It is found that the atomic number of iron is 26. This means that its atoms contain 26 protons in their nuclei. And if neutral then 26 electrons in their electron clouds.
As we know that the shell value is denoted by the principal quantum number (n). K = 1, L = 2, M = 3, N = 4, O = 5.
- The electronic configuration of Fe is:
$1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}4{{s}^{2}}$
- From the electronic configuration it was observed that,
K shell contains 2 total electrons ($1{{s}^{2}}$)
L shell contains 8 total electrons ($2{{s}^{2}}2{{p}^{6}}$)
M shell contains 8 total electrons ($3{{s}^{2}}3{{p}^{6}}$)
N shell contains 8 total electrons ($3{{d}^{6}}4{{s}^{2}}$)
- As we know that 4s sublevel fills before the 3d sublevel because it has lower energy. We can say that the electronic configuration lists the sublevels of each energy level, even if the 4s sublevel has lower energy than that of the 3d sublevel.
Note: It should be noted that we might get confused with the idea of a half filled and partially filled orbital. Basically, it is found that half filled d orbital contains only five electrons, whereas partially filled d orbital can have anywhere in between one to nine electrons in them, but it is not fully occupied.
Complete Solution :
- As we know that iron is a transition metal. It basically follows the Aufbau principle of the filling of the atomic orbitals.
- It is found that the atomic number of iron is 26. This means that its atoms contain 26 protons in their nuclei. And if neutral then 26 electrons in their electron clouds.
As we know that the shell value is denoted by the principal quantum number (n). K = 1, L = 2, M = 3, N = 4, O = 5.
- The electronic configuration of Fe is:
$1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}4{{s}^{2}}$
- From the electronic configuration it was observed that,
K shell contains 2 total electrons ($1{{s}^{2}}$)
L shell contains 8 total electrons ($2{{s}^{2}}2{{p}^{6}}$)
M shell contains 8 total electrons ($3{{s}^{2}}3{{p}^{6}}$)
N shell contains 8 total electrons ($3{{d}^{6}}4{{s}^{2}}$)
- As we know that 4s sublevel fills before the 3d sublevel because it has lower energy. We can say that the electronic configuration lists the sublevels of each energy level, even if the 4s sublevel has lower energy than that of the 3d sublevel.
Note: It should be noted that we might get confused with the idea of a half filled and partially filled orbital. Basically, it is found that half filled d orbital contains only five electrons, whereas partially filled d orbital can have anywhere in between one to nine electrons in them, but it is not fully occupied.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE