hydrogen
+1 OR -1
lithium
+1
sodium
+1
potassium
+1
rubidium (Rb)
+1
cesium (Cs)
+1
francium (Fr)
+1
beryllium
+2
magnesium
+2
calcium
+2
strontium (Sr)
+2
barium
+2
radium (Ra)
+2
aluminum
+3
gallium (Ga)
+3
indium (In)
+3
nitrogen
-3
phosphorus
-3
arsenic
-3
oxygen
-2
sulfur
-2
fluorine
-1
chlorine
-1
bromine
-1