Welcome to the Periodic Table of the Elements Series.
This is a Letterbox Hybrid cache. It is not at the posted coordinates. Solve the puzzle to calculate GZ.
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Selenium
Palladium
Ruthenium
Hydrogen
Silicon
Fluorine
Zirconium
Cesium
Boron
The stamp in the cache is to remain in the cache. Feel free to use it in your Letterbox Hybrid Stamp Logbook (if you have one) and also if you have a personal stamp please use it in the cache logbook.
Please BYO Pen/Stamp.