observe the modern periodic table explain the gradation in reactivity of halogen family
Answers
Answer:
Atoms of elements consist of a nucleus that contains protons and neutrons. The nucleus is surrounded by electrons that move around in orbits, or levels. Atoms of an element react with other atoms based on the number of electrons found in their outer orbit. These outer electrons are called valence electrons. For an atom of an element to be nonreactive, it must have eight electrons in its outer level. All members of the halogen family have seven valence electrons.
Because these atoms are so close to having a full set of eight valence electrons, they're very reactive. They show a chemical tendency to gain one electron by forming bonds and taking the electron from other atoms to attain a full set. Because of their chemical reactivity, these elements do not exist as single elements in nature. They are only found in compounds.
Explanation:
Halogens have a variety of uses. Many household cleaning products contain halogen, such as the chlorine found in bleach. Fluorine and chlorine are both abundant in nature as compounds with other elements and are present in biological compounds. Table salt, used to flavor foods, is an essential part of the human diet. It is composed of sodium bonded with the halogen chlorine (NaCl). Humans also require iodine. The halogen iodine is found in iodized table salt as well.
Many towns and cities add fluorine to their water supplies. It is also found in toothpaste because it prevents tooth decay. Bromine is found in the compound silver bromide that is used in photographic film as a light-sensitive coating. Iodine is also used to sterilize the skin of a patient before surgery because it has antibacterial properties. Astatine is radioactive and is sometimes used as a radioactive tracer in cancer treatments.