Questão | Responda |
Element | Pure, made of one atom only one capital & maybe a number |
Compound | two or more different elements chemically bonded two or more capitals e.g. HF, H2O |
Atom | one capital letter & no numbers e.g. O, Ar |
Molecule | either 2 capitals or a capital and a number e.g. O2, HF |
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