Atomic Number of O = 8, Electrons in K shell = 2, Electrons in L shell = 6. Configuration = 2, 6

Q. Given, K shell has 2 electrons, L shell has 8 electrons, M shell has 11 electrons, N shell has 2 electrons. The number of electrons present in orbital with $l=2$ is:

Q. An atom $A$ has 2, 8 and 3 electrons in K, L and M sub-shells respectively. Another atom $B$ has 2 and 6 electrons in K and L sub-shells respectively. The formula of the compound formed between $A$ and $B$ is :

Q. What do you understand by the term "electronic configuration" of an element? Write down the electronic configuration of oxygen (At. No. = 8).
An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom?

Q. An element X has 3 electrons in its third shell. Fill in the following details.

Electronic Configuration
Atomic Number
Name
Symbol