O Level Chemistry MCQs – Certification Test 548

Protons Neutrons and Electrons Quiz (Question 548) – App & e-Book Download

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MCQ 548: Mass of an electron is:

¹⁄₁₈₄₀ of a proton only
¹⁄₁₈₄₀ of a neutron only
1860 times of a proton
¹⁄₁₈₄₀ of a proton and neutron

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