Tony Sanchez Mauricio Arias


The halogens or halogen elements are a group in the periodic table consisting of five chemically related elements: fluorine, chlorine, bromine, iodine, and astatine. The artificially created element 117 may also be a halogen.

flourine (F)

Fluorine is an extremely reactive and poisonous chemical element. At room temperature, it is a pale yellow gas composed of diatomic molecules.

chlorine (Cl)

Chlorine is a chemical element with symbol Cl and atomic number 17. Chlorine is in the halogen group and is the second lightest halogen after fluorine. The element is a yellow-green gas under standard conditions, where it forms diatomic molecules.

bromine (Br)

Bromine is a chemical element with the symbol Br, and atomic number of 35. It is in the halogen group. The element was isolated independently by two chemists, Carl Jacob Löwig and Antoine Jerome Balard, in 1825–1826.

iodine (I)

Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of elemental iodine vapor.

astatine (At)

Astatine is a radioactive chemical element with the chemical symbol At and atomic number 85. It occurs on Earth only as the result of the radioactive decay of certain heavier elements.