group 7 Flashcards
what are group 7 elements known as?
Group 7 elements are known as the halogens.
why do group 7 elements all react in a similar way?
Group 7 elements all react in a similar way as they all have 7 electrons in their outer shell.
what are group 7 elements?
Group 7 elements are non- metals and consist of molecules made of pairs of atoms eg
Br2
what happens to the melting and boiling points as you go down group 7?
The melting point and boiling point of group 7 increase as you go down the group.
how do group 7 form ionic compounds?
The halogens form ions with a charge of 1- by gaining an electron when reacting with metals to form ionic compounds.
what happens in a compound when reacting with a more reactive halogen?
A more reactive halogen will displace a less reactive halogen from a compound.
how do halogens form covalent molecules?
The halogens form covalent molecules by sharing electrons with other non- metals.
in group 7, what happens to the reactivity as you go down the group?
reactivity decreases
