To determine how many valence electrons are present in the highlighted group, first, we need to identify the group from the provided periodic table. The highlighted group consists of the elements: Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At).
These elements belong to Group 17 of the periodic table, which is also known as the Halogens group.
The key characteristic of elements in Group 17 is that they have 7 valence electrons. The valence electrons are the outermost electrons of an atom and are important in determining how the element reacts chemically.
So, the number of valence electrons present in the highlighted group (Group 17, Halogens) is:
[tex]\[ \boxed{7} \][/tex]
This explains why the answer to the question "How many valence electrons are present in the highlighted group?" is 7.
