Endothermic because it 'sucks' the energy and that's why temperature drops
Answer:
K
Explanation:
The key aspect in this question is to look for Ionization Energy (EI), which describe the needed energy to take out an electron. Thefore, the potasiumm need lower energy . Another important thing is analyze how K will take nobel gas electron configuration when loss 1 electron, this It will be more stable
I believe it is a solution but I am not Shure
