Matching exercise

Match the items on the right to the items on the left.
SulphurS
SiliconSi
IronFe
CarbonC
CobaltCo
ChromiumCr
CalciumCa
HeliumHe
ArgonAr
CopperCu
SodiumNa
PotassiumK
IodineI
ArsenicAs
IndiumIn
TinSn
NickelNi
NitrogenN
GoldAu
SilverAg