Nurturing Life Sciences
#Id: 9823
#Id: 8182
#XL - Q Biochemistry
#Id: 7756
Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7
#Id: 8422
#XL - T Zoology
#Id: 10619
#XL - R Botany
#Id: 1316