IGCSE O Level Chemistry MCQs – Practice Test 9 (Chapter 14)
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MCQ 41: If n=1, the maximum number of electrons in a shell can be recalled through the formulae:
MCQ 42: If nucleon and neutron numbers are 27 and 14 respectively, the number of electrons will be:
MCQ 43: If nucleon number of fluorine is 19, proton number will be:
MCQ 44: If nucleon and proton number of argon is 40 and 18 respectively, the respective number of electrons and neutrons will be:
MCQ 45: Nucleon number of an element is equal to the:
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