What is the oxidation number of an element? A. The number of atoms of an element in a formula

B. The charge an element would have if it lost or gained electrons

C. The number of valence electrons an element has

D. The group number for the element

The charge an element would have if it lost or gained electrons

1)Thus based on the diagram , the values of principle quantum number that can be assigned to the electrons are : 2,3 and 4.

2)This quantum number tells us the shell in which an electron is present and how far it is roughly from the nucleus.

Explanation:

According to the rules of electron filling in subshells in quantum mechanics , Aufbau's principle states that :

"An electron must be filled in a lower energy state or subshell and then higher. If they have the same energy , the one with lesser principal quantum number will be filled first."

Thus ,

The series of filling goes like:

Thus , the subshells in the given information have 1,3 and 1 orbitals respectively. Thus it has to be which is possible in two cases :

1)Thus based on the diagram , the values of principle quantum number that can be assigned to the electrons are : 2,3 and 4.

2)This quantum number tells us the shell in which an electron is present and how far it is roughly from the nucleus.