What energy transform occurs when the hot plate is plugged into the outlet and the control knob is on position? Thermal to mechanical
Thermal to electrical
Electrical to thermal
Mechanical to thermal

Iknow the answer is a but i don't know why

Iknow #2 is d. i just need to know why

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive