Elements with low specific heat values have which characteristic? low atomic mass high thermal energy low kinetic energy low number of atoms per gram

I believe the answer is High thermal energy.
If a substance has a low specific heat, it means it will heat or cool quickly than a high heat compound. 
High value means that it takes more energy to raise or lower its temperature, while a low value means that it does not take very much energy to heat or cool it. Adding heat to a low specific heat compound will increase its temperature much more quickly than adding heat to a high specific heat compound.