Which sample of copper has atoms with the lowest average kinetic energy? 1. 10. g at 45°c 2. 20. g at 35°c 3. 30. g at 25°c 4. 40. g at 15°c

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.