O Level Chemistry e-Book's MCQs - Complete
Proton and Nucleon Number App's Quiz Download & e-Book - 612
Apps:
MCQ:
The number of electrons in calcium is 20. outermost shall have as many as
- no electrons
- 1 electron
- 2 electrons
- more than 2 electrons
c
O Level Chemistry App & e-Book Tests PDF Download
Chemical Reaction and Factor Affecting Test 623
Chemical Symbols Test 624
Pure Substances and Mixtures Test 625
College Chemistry Test 626
Ionic Compounds and Crystal Lattices Test 627
Salts and Hydrogen of Acids Test 628
Oxidation and Reduction Test 629
Molecules and Macromolecules Test 630
Collection of Gases Test 631
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O Level Chemistry MCQs eBook Download
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