PTC Row 7: The Periodic Table Challenge GC2Q97C
by BerkeleyBoomers
Contra Costa county, CA, United States
28.7 Points
53 finds in 15 years, 2 months
Next find points: 28.2
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First available: May 7, 2011
Last Update: July 20, 2026 4:20 PM
Last Full Sync: June 22, 2026 1:39 PM
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