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20 elements
Question | Answer |
---|---|
Hydrogen | H |
Helium | He |
Lithium | Li |
Beryllium | Be |
Boron | B |
Carbon | C |
Nitrogen | N |
Oxygen | O |
Fluorine | F |
Neon | Ne |
Sodium | Na |
Magnesium | Mg |
Aluminum | Al |
Silicon | Si |
Phosphorus | P |
Sulphur | S |
Chlorine | Cl |
Argon | Ar |
Potassium | K |
Calcium | Ca |