Intellectual Olympiad in Chemistry - 2026 ongoing
1000 ₸
Subject: Chemistry Level: II (I is easiest, XII is hardest)
Category: student
Question language: English
Questions: 15
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