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Elements/types of energy (Types of energy (Kinetic (The energy in moving…
Elements/types of energy
Elements
Chemical reactions join or split atoms to rearrange them. But they cannot change one element into another element, or anything simpler. A chemical reaction cannot turn lead into gold, becuse it can't change the atoms into different elements.
Lead and gold are elements too. A piece of pure gold contains only gold atoms. A piece of pure lead contains only lead atoms.
The atoms of other elements, such as hydrogen and oxygen, join together to make molecules.
Compounds
H20 (1 hydrogen, 2 oxygen
Some formulae are more complicated. For example, the formula for sodium sulfate is Na2SO4. It tells you that sodium sulfate contains two sodium atoms (Na2), one sulfur atom (S) and four oxygen atoms (O4).
Types of energy
Kinetic
The energy in moving objects, also called movement energy
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Chemical
Stored in fuel, foods and batteries
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