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groups - Coggle Diagram
groups
group 7
halogens
7 electrons in outer shell
found as diatomic molecules
when diatomic = covalent bonded
form - ions
charge -1 when ions
react with metals to form metals to form salts
reactivity decreases going down
group 1
Alkali metals
1 electron in outer shell
+1 charge when ions
reactivity increases going down group- more shells and electromagnetic forces
form + ions
react with non-metals to form salts
group 0
noble gases
unreactive
full outer shell
boiling points increase going down the group
found as single atoms