Wednesday, October 21, 2026
Plain #4
The day’s seven targets and the closest answers in our lists, with their real values. Points are before bonuses.
Round 1 · ⚛️ Element atomic number
How many protons are in the nucleus of one nitrogen atom?
Answer
7 protons
Nitrogen's symbol is N; PubChem places it in the nonmetal group.
NIH PubChem · Periodic Table of ElementsRound 2 · ⚡ Element ionization energy
Name a chemical element closest to 16 eV.
Target 16 eV
Round 3 · 🌍 Capitals: distance from Washington, D.C. · Golden Round ×2
Name a capital city closest to 6.3K km.
Target 6,300 km
Round 4 · ♨️ Element boiling point
At approximately how many kelvin does helium boil, using the PubChem table?
Answer
4.22 K
Kelvin starts at absolute zero. Helium's chemical symbol is He.
NIH PubChem · Periodic Table of ElementsRound 5 · 🌍 Capitals: distance from Cairo
Name a capital city closest to 4.9K km.
Target 4,900 km
Round 6 · 🔋 Element electron affinity
Name a chemical element closest to 0.3 eV.
Target 0.3 eV
Round 7 · 🧑🚀 Planetary equatorial gravity · Finale
Name a planet or dwarf planet closest to 10 m/s².
Target 10 m/s²