Question #e453d
1 Answer
The arrangement of electrons in the orbitals of an atom or molecule.
Explanation:
So basically the electronic configuration tells us which element is present in which groups, in which periods and in which block (s block, p block, d block and f block).
By knowing how many electrons are present in the shells, we can find the place of an element in the periodic table.
Q: Find the electronic configuration of aluminium?
Ans:
So,
#(1s^2)/"K" " " (2s^2,2p^6)/"L"" "(3s^2,3p^1)/"M"#
Here
As
#2+1=3#
it must be present in group lllA (in Roman Numerals). or group 13. and in the last shell, we have a