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Question	Answer
What elements are in the Halogens?	fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At)
What group?	Known as group 17 in modern IUPAC, in block p
Electrons in outer shell	7 electrons in smaller elements, 17 in elements with d orbitals
Properties	The halogens is the only group that contains elements in all three familiar states of matter(solid, liquid and gas) at standard temperature and pressure.
Reactivity?	Have a high reactivity due to the high electronegativity of the atoms due to their high effective nuclear charge
Useful fact	The middle halogens, that is, chlorine, bromine and iodine, are often used as disinfectants. The halogens are also all toxic.
Reaction with hydrogen	All of the halogens form acids when bonded to hydrogen
Where are they found?	Most halogens are typically produced from minerals or salts
Reactions	They can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements in existence

The halogens- Periodic table

	Created by eoin.examtime almost 12 years ago

	Copied by mia.rigby almost 12 years ago