Hey there!
I believe the answer you are looking for is Unbalanced!
If I am incorrect I am very sorry and would love any feedback.
Have a nice day, and Happy Halloween!
Carbon, Nitrogen, and Oxygen all have the same number of energy levels because periods (rows) tell the amount of energy levels an element has.
I believe the answer would be D)radioisotope
Plates at our planet's surface move because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again. Is this helpful?