The Group 7 close Group 7 The vertical column of non-metal elements next to group 0 in the periodic table, also called the halogens. elements close element A substance made of one type of atom ...

The elements in group 7 are known as halogens. Fluorine and chlorine are gases. Bromine is one of only two liquid elements. Iodine is solid. They exist as diatomic molecules - they have two atoms ...

Excerpted from A Tale of 7 Elements, by Eric Scerri. ... The color is expected to be very dark and most probably black on the basis of the trend among the halogen group, to which astatine belongs.