Answer:
The answer would be C). All of the elements inside a period will always have the same amount of shells. Hope this helps!
The potential energy of the reactants is 200J.
From the energy diagram, the energy of the product formed is 350J; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.<span />
Robert Hooke deterred that all animals were made of cells
Gravity is the force that keeps the planets in orbit.
