write the electronic configuration of copper at number 29 . mention its periond group and block in the periodic table
Answers
The electronic configuration of copper having atomic number 29 is 2,8, 18, 1. It can also be written as 1s22s22p63s23p63d104s14p0.or [Ar]3d104s14p0.
Answer:
(((a))) PREDICTION of PERIOD
In the electronic configuration of an atom , the principal quantum number of valance electron represents the PERIOD
the element.
example :- Ca ( atomic no = 20 )
configuration of Ca : 1s, 25, 2p^6,3s , 3p^6, 4s .
valance electrons = 2 ( in 4S)
Principal Quantum no = 4
hence, period of Ca is 4th
PREDICTION of GROUP
The orbital ( S, P, d, or f] which receives the last electton represents the block of the element.
- The group of the element is predicted from the block of the elements as :-
(1) if the element belongs to S- block, it's group number is equal to the number of valance electrons.
(2) if the element belongs to P-block,
Group number = 10 + number of valance electrons = 10 +nS electrons + nP electrons
(3) if the elements belongs to d -block, Group number = number of electrons in (n-1)d subshell + number of electrons in nS subshell.
(4) if the element belong to f - subshell, group number is
always 3.