Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

The electronic configuration of Iron is 2,8,14,2 which clearly doesn't fit in the rules 2n² Please explain the rule used in writing this electronic configuration?
Asked by Varsneya Srinivas | 31 Jan, 2016, 11:07: AM
answered-by-expert Expert Answer

According to the Bohr theory of electronic distribution, we  know that there are shells which are named as K, L, M , N,..... and they carry 2, 8, 18, 32,... electrons respectively. But in actual theory, each of the shell is further divided into subshells which are named as s, p, d, f subshells. These subshells consist of a specific number of orbitals. Each s-subshell can have maximum of two electrons, p-subshell can have six electrons and so on.. In case of Iron, it has incompletely filled d-subshell due to which it has configuration 2, 8, 14, 2 and not 2, 8, 8, 8. Also, The last electron is present in the d-subshell.

Answered by Hanisha Vyas | 01 Feb, 2016, 11:54: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Chemistry
what is elements
Asked by dhumalchhaya13 | 26 May, 2022, 11:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
what is periods
Asked by kanchanbalpande82 | 12 Apr, 2022, 11:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
what is periods
Asked by kanchanbalpande82 | 12 Apr, 2022, 11:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
Modern period table  
Asked by waghmaresheetal78 | 27 Dec, 2021, 05:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
1. Electronic configuration of an element ‘x’ is 2.8.1 and for ‘Y’ 2.8.7 then mention the bond existing between 2 elements. a) Covalent bond b) Ionic bond c) Hydrogen bond d) Metallic bond 2. Identify the element in a 2nd period and 14th group with valency 4. a) Carbon –C b) Silicon – Si c) Boron – B d) Fluorine – F 3. Modern periodic law state that “the properties of elements are the periodic function of their ___________. a) Atomic number b) Atomic mass c) Valiancy d) Atomic radius.   Name the group of hydrogen.   9. In a Modern periodic table how the ionization energy, metallic nature and atomic radius vary? 10. 6 C 12 , 20Ca40 , 21SC45 Write the Electronic configuration of given elements and mention the group period and block    
question image
Asked by ksheera36 | 03 Jun, 2021, 08:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
How tp learn the symbols element
Asked by vungtsaniyanthan | 16 May, 2021, 06:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
drawbacks of mendeleev and modern periodic table with example
Asked by sinhagopalakumara | 01 May, 2021, 08:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
Que:-How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Asked by advssdrall | 26 Mar, 2021, 07:43: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
how does the atomic size vary as you go down a group?
Asked by shettyshrinidhi271 | 07 Jan, 2021, 05:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
Just as the way we locate a point on graph as (x, y), can we locate an element as (group number, period)?
Asked by adipadmakarri | 05 Dec, 2020, 06:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×