fluorine, oxygen and chlorine — are gases at room temperature and normal pressure. They also go by the name "elemental gases." Bromine is always a liquid, while iodine can be a liquid or solid ...

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 ...