Quick answer: Electrons fill shells from the nucleus outwards, holding 2, 8 and 8 in the first three shells of the first 20 elements. This Chemistry 9-10 quiz checks electron arrangement with 10 multiple-choice questions and instant feedback; every answer comes with a short explanation.
This electron arrangement quiz for chemistry grades 9-10 has quick multiple-choice questions with instant feedback. Need a refresher first? Read the lesson or do the worksheet on electron arrangement.
Choose one answer for each question. Wrong options come from common mix-ups of group and period, of shells and electrons, and of Mendeleev and Moseley. Read the explanation after each answer.
Level: Chemistry grades 9-10 (GCSE · IGCSE · O Level · Class 9-10) · Curriculum: HS-PS1-1, HS-PS1-2
