Periodic Table Decoder
Convert element symbols to atomic numbers and vice versa. Look up element information.
e.g., "He Li Be" or "N O S"
Click to add element
What is the Periodic Table?
The periodic table is a tabular arrangement of chemical elements, organized by atomic number, electron configuration, and chemical properties. Each element has a unique symbol (1-2 letters) and atomic number.
Periodic Table in Geocaching
The periodic table is popular in geocaching puzzles because:
- Symbol encoding: Element symbols can spell words or encode messages
- Atomic numbers: Numbers can represent coordinates or codes
- Science themes: Perfect for educational or lab-themed caches
- Dual encoding: Both symbols AND numbers provide clues
Common Puzzle Techniques
- Spelling with symbols: "CaNdY" = Ca (20) N (7) Dy (66)
- Atomic number sums: Add numbers to get coordinates
- Element properties: Use mass, group, or period for encoding
- Element names: First letters spell a message
Useful Elements for Encoding
Some elements have symbols that match common letters:
- Single letters: B, C, F, H, I, K, N, O, P, S, U, V, W, Y
- Two-letter words: He, Li, Be, Ne, Na, etc.
- Spelling tricks: CoFFEe, CArBON, SILiCoN
Example Puzzle
If a puzzle shows "Au Ag Cu Fe", the atomic numbers are:
- Au (Gold) = 79
- Ag (Silver) = 47
- Cu (Copper) = 29
- Fe (Iron) = 26
These could form coordinates: N 79° 47.29' or be added together.