O Level Chemistry MCQs – Certification Test 135
MCQ 135: Number of protons in sodium is 11. the number of electrons in the outermost shell will be:
The App: Proton and Nucleon Number MCQ App to Learn Proton and Nucleon Number Notes, O Level Chemistry MCQ App, and A level Chemistry MCQ App for chemistry virtual academic continuity.
Download the "O Level Chemistry MCQ" App: Free Proton and Nucleon Number MCQ App (Android & iOS) to maximize chemistry digital readiness. Download Play Store & App Store Study Apps with all functionalities to enhance chemistry learning.