Final answer:
In an electron-dot symbol of an element, the dots represent the valence electrons of the atom, which are involved in chemical bonding and determine the number of bonds an atom can form.
Step-by-step explanation:
In an electron-dot symbol of an element, the dots are used to represent the valence electrons of the atom. These valence electrons are the electrons in the outermost shell of the atom and are involved in chemical bonding.
The dots in the electron-dot symbol help to determine the number of bonds an atom can form. Each unpaired dot represents one potential bond that the atom can make.
For example, the electron-dot symbol for hydrogen would simply be a single dot (•) around the symbol of hydrogen (H), representing its single valence electron.