Solved: How many inner, outer, and valence electrons are

Solution 29P

Here, we are going to determine the inner, outer, and valence electrons are present in an atom of each of the following elements.

Step 1:

The valence electrons is defined as the outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond.

As we know that,

For the main-group elements, the valence electrons are equal to those in the outermost principal energy level . Thus, the group number of a main-group element is equal to the number of valence

electrons for that element.

On the other hand, The core or inner electrons are those which are in complete principal energy levels and those in complete d and f sublevels.

For example: Si atom, 1s.22s22p63s23p2