Solved: Identify each element below, and give the symbols

Solution 30P:

Here, we are going to Identify each element below, and write the symbols of the other elements in its group.

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.