M4 The
Periodic Table: Halogens
Slide 3 of 45
Group 7 – The Halogens
All the elements in Group 7 are
nonmetals except for astatine, which is a
radioactive metalloid.
These elements are called halogens,
which means “salt-former.”
All of the halogens form salts
with sodium and with the other alkali metals.
