Write the symbols of the family of elements that have seven electrons in their outermost energy level.
To determine the symbols of the family of elements that have seven electrons in their outermost energy level, we need to refer to the periodic table.
First, let's identify the group of elements that corresponds to the outermost energy level containing seven electrons. The periodic table is divided into 18 columns or groups. The group number indicates the number of electrons in the outermost energy level.
Elements in Group 7 have seven electrons in their outermost energy level. This group is commonly known as Group 7 or Group VII. It is also referred to as the halogens.
The symbols of the elements in Group 7 are as follows:
1. Fluorine (F)
2. Chlorine (Cl)
3. Bromine (Br)
4. Iodine (I)
5. Astatine (At)
These elements are all located in Group 7 of the periodic table and have seven electrons in their outermost energy level.