The Periodic Table- Group 7 Flashcards
Group 7 elements are known as the ________.
Group 7 elements are known as the halogens.
Group 7 elements all react in a _______ way as they all have _ electrons in their outer shell.
Group 7 elements all react in a similar way as they all have 7 electrons in their outer shell.
Group 7 elements are ___-______ and consist of molecules made of _____ of atoms eg Br_
Group 7 elements are non- metals and consist of molecules made of pairs of atoms eg Br2
The _______ point and _______ point of group 7 ________ as you go down the group.
The melting point and boiling point of group 7 increase as you go down the group.
In group 7 the reactivity _________ as you go down the group.
In group 7 the reactivity decreases as you go down the group.
The halogens form ions with a charge of __ by gaining an electron when reacting with metals to form _____ _________.
The halogens form ions with a charge of 1- by gaining an electron when reacting with metals to form ionic compounds.
A more ________ halogen will ________ a less reactive halogen from a ________.
A more reactive halogen will displace a less reactive halogen from a compound.
The halogens form ________ _________ by _______ electrons with other ___- ______
The halogens form covalent molecules by sharing electrons with other non- metals
what happens to the relative molecular mass as you move down group 7
it increases- the molecules get bigger as you’ve down the group
when halogens react with metals what gets formed
an ionic compound
what happens when any group 7 element reacts with any metal
the group 7 element will form a -1 ion as it gains an electron
when does the name of the halogens change and was to they change to
when they become negative ones they will end with ide
for example fluorine - fluoride
why does reactivity decrease as you go down the group.
use chlorine and fluorine as an example
chlorine is less reactive because it gains an electron less easily as there is a greater distance between the nucleus and the outer electron - meaning ht outer electrons are less attracted to the nucleus
shielding - internal electrons repell outer electron
a ____ ________ halogen can displace a ____ ________ halogen from an ________ solution of its salt
