+1
sodium ion Na+
potassium ion K+
silver ion Ag+
copper(1) ion Cu+
hydrogen ion H+
ammonium ion NH4+
+2
calcium ion Ca2+
magnesium ion Mg2+
zinc ion Zn2+
barium ion Ba2+
iron(ii) ion Fe2+
copper(ii)ion Cu2+
tin(ii) ion Sn2+
lead(ii) Pb2+
+3
iron(iii) ion Fe3+
aluminium ion Al3+
chromium(iii) ion Cr3+
+4
tin(iv)ion Sn4+
lead(iv)ion Pb4+
gosh .________.
i must hafal allll this stupid thing in this week!
