Question

write the name. the period with electron in the shell K , L ,M

Answer 1

HEY USER YOUR ANSWER IS HERE..


The shells K, L and M are the shells based on the study of orbits. In the modern periodic table the study based on orbits is limited only upto the first twenty elements.


Then what should we study?
We should study which is based on orbitals.
.
What are orbitals?
In simple language the orbitals are present inside the orbits. Just like orbit have K, L, M, N orbitals have s, p, d, f. Their maximum capacities are :check out the photograph.

Coming to the point......
In a period the electron configuration goes on increasing by one valence electron(outermost electron) For eg: In period 2 the first element is lithium whose electronic configuration is (2,1) and of the last element Neon is (2,8).

In a group the electronic configuration goes on increasing by one shell. For example :In period 1 Lithium is the second element and its configuration is (2,1) and the last element Francium has configuration of (2,8,8,8,8,1).

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