Studied by 13 people
what are the halides
fluorine (F), chlorine (Cl), bromine (Br), iodine (I)
what are Group 7 elements are commonly known as
Halogens
what is the Reactivity trend in Group 7
The reactivity of halogens decreases as you go down Group 7.
what is the Most reactive halogen
Fluorine (F) is the most reactive halogen.
what is the Least reactive halogen
Astatine (At) is the least reactive halogen, although it is very rare and highly radioactive.
what is Chlorines state of matter at room temp
Chlorine (Cl) exists as a diatomic gas at room temperature and pressure.
what is Iodines boiling point compared to to the rest of the halogens
Iodine (I) has the highest boiling point among the halogens.
what is Fluorine melting point compared to to the rest of the halogens
Fluorine (F) has the lowest melting point among the halogens.
what happen when Halogens react with a metal
Halogens react with metals to form a salt compounds called metal halides. also will become a negative ion 1-
halogen + metal ——> metal halide
chlorine +sodium ——> sodium chloride
Cl + Na ——> NaCl
explain the Boiling point trend of halogens as you go down the group
The boiling points of the halogens increase going down group 7. This is because, going down group 7 as
the molecules become larger
the intermolecular forces become stronger
more energy is needed to overcome these forces
colour and state of Chlorine and bromine at room temperature
Chlorine is a pale green gas, while bromine is a brown liquid at room temperature.
what happen in an Halogen displacement reaction?
A more reactive halogen can displace a less reactive halogen from a solution of its salt. e.g if fluorine is added to sodium chloride, the more reactive fluorine will displace the less reactive chlorine to become sodium fluoride and chlorine
sodium-chloride + fluorine ——> sodium fluoride +chlorine
NaCl + F ——> NaF + Cl
Note
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