ionic valence造句

One group includes elements having large ionic radius, such as potassium, rubidium, caesium, strontium, barium ( called "'LILE "', or large-ion lithophile elements ), and the other group includes elements of large ionic valences ( or high charges ), such as zirconium, niobium, hafnium, rare earth elements ( REE ), thorium, uranium and tantalum ( called "'HFSE "', or high field strength elements ).
It's difficult to find ionic valence in a sentence. 用ionic valence造句挺难的