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Alternative clues for the word atnos

• Proton counts: Abbr
• B and O figures: Abbr.
• 92 and 53 for U and I
• 1 for H and 2 for He, e.g
• Periodic law figs
• 5 for B and 6 for C
• 7 for N, 8 for O, etc.
• Chem. class data
• They go from 57 to 71 in the lanthanide series: Abbr