Answer:
halogens
Step-by-step explanation:
The term halogen is used to refer to each of the six chemical elements that are part of group 17 of the periodic table, and are the following: bromine, chlorine, iodine, fluorine, tenesus and astatine. These elements have in common certain chemical behaviors, such as that they form sodium salts that closely resemble each other; For this reason, the etymology of its name can be translated as "salt producers."
Halogens show a tendency to form a halide ion: a compound that has a halogen atom and a functional group, cation or element with less electronegativity. Compounds that have halogens are known as halogenated compounds.
With seven valence electrons in its outer shell, the halogens must react with another element to comply with the octet rule. The high electronegativity of their atoms gives them high reactivity, a characteristic that makes them harmful to living things in certain quantities. They all have 5 electrons in their last orbital p