Intellectual Olympiad in Chemistry - 2026 ongoing

Subject: Chemistry
Level: II
Category: student
Quiz questions: in English
Example question: Which electron configuration belongs to a neutral sodium atom in its ground state? 1s² 2s² 2p⁵, 1s² 2s² 2p⁶ 3s², 1s² 2s² 2p⁶ 3s¹, 1s² 2s² 2p⁶ 3p¹