Chemical symbols of elements 1–20
20 questions · Intermediate
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How to answer
Write the chemical symbol for the elements with atomic numbers 1–20. The first letter is a capital; a second letter is lowercase. Tap Swap sides to practice the other way around.
| 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 |
| sulfur | S |
| chlorine | Cl |
| argon | Ar |
| potassium | K |
| calcium | Ca |
Sources (21)
We checked the answers against these references.
- Wikipedia: List of chemical elements
- Wikipedia: Hydrogen
- Wikipedia: Helium
- Wikipedia: Lithium
- Wikipedia: Beryllium
- Wikipedia: Boron
- Wikipedia: Carbon
- Wikipedia: Nitrogen
- Wikipedia: Oxygen
- Wikipedia: Fluorine
- Wikipedia: Neon
- Wikipedia: Sodium
- Wikipedia: Magnesium
- Wikipedia: Aluminium
- Wikipedia: Silicon
- Wikipedia: Phosphorus
- Wikipedia: Sulfur
- Wikipedia: Chlorine
- Wikipedia: Argon
- Wikipedia: Potassium
- Wikipedia: Calcium