Table of Contents
What are halogens give one example?
All the group 17 (7B) elements except astatine are definitively considered halogens. So, fluorine ( F ), chlorine ( Cl ), bromine ( Br ), and iodine ( I ) are the known, definitively accepted halogens.
What are halogens Wikipedia?
The halogens (/ˈhælədʒən, ˈheɪ-, -loʊ-, -ˌdʒɛn/) are a group in the periodic table consisting of five or six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
What is special about halogen?
Halogens are highly reactive, and they can be harmful or lethal to biological organisms in sufficient quantities. This reactivity is due to high electronegativity and high effective nuclear charge. Halogens can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements.
Where does the word halogen comes from?
The name “halogen” means “salt former”, derived from the Greek words halo- (“salt”) and -gen (“formation”).
What is halogen used for?
Halogens are used in the chemical, water and sanitation, plastics, pharmaceutical, pulp and paper, textile, military and oil industries. Bromine, chlorine, fluorine and iodine are chemical intermediates, bleaching agents and disinfectants.
Are halogens Coloured?
Almost all halogens are coloured. This is because halogens absorb radiations in the visible region. This results in the excitation of valence electrons to a higher energy region. Since the amount of energy required for excitation differs for each halogen, each halogen displays a different colour.
What are facts about halogen?
The halogens are a group of elements on the periodic table. It is the only element group that includes elements capable of existing in three of the four main states of matter at room temperature: solid, liquid, and gas. The word halogen means “salt-producing,” because halogens react with metals to produce many important salts.
What are some examples of halogen?
Types of Halogens Fluorine Chlorine Bromine Iodine Astatine Tennessine (might behave as a halogen, at least in some respects)
What is the best definition for halogen?
Definition of halogen. (Entry 1 of 2) : any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VIIA of the periodic table and exist in the free state normally as diatomic molecules. halogen. adjective.
What is a common halogen?
The common halogens are the elements fluorine, chlorine, bromine, and iodine. They can exist by themselves in rather pure form. They may be mixed in a more or less easily separable mixture. They can also be combined with other elements, forming compounds.