Chemistry - Atomic Structure - Electron configuration - shells and energy levels - The Electron Parking Lot

An analogy-based intro for Grade 9. Present: 'Imagine electrons are cars in a multi-level parking garage. The garage has rules!' Scenario: 'A new atom has 11 electrons (cars) that need to park. The garage has 3 levels. Level 1 (closest to entrance/nucleus) has only 2 spots. Level 2 has 8 spots. Leve