This is an intelligent enough group that I'll throw out something that's been bugging me for quite a while and this makes me question it even more: Did the rad

This is an intelligent enough group that I'll throw out something that's been bugging me for quite a while and this makes me question it even more: Did the radium girls actually die of radiation? Radium is a row 7 element, AFIAK everything in row 7 is quite toxic. Radium is below calcium in the periodic table. Thus, the body is going to put it in bones. And we saw horrors in their bones. Did it kill via radiation or via being toxic?