Bohr diagram of Ca please. Also add if it lost or gained an electron. Dont copy and paste off the internet because i could do that

Fred is studying a substance that is made out of only one element. this means that

Which is true according to the law of conservation of energy

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.