IGCSE O Level Chemistry Practice Test 13
Proton and Nucleon Number Quiz Questions and Answers PDF Download - 13
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Proton & Nucleon Number Questions and Answers PDF Download: MCQ 13
If the nucleon (mass) and proton (atomic) number is 40 and 20 respectively, the element is
- chlorine
- phosphorus
- potassium
- calcium
All are covalent compounds except
- NO2
- SO3
- SO2
- HNO3
While forming crystals, it is important to
- evaporate to dryness to get purest possible crystals
- attach the gas syringes to collect fumes
- not evaporate the water of crystallization
- use high flames
The empirical formula is the
- simplest formula
- molecular formula
- chemical formula
- ionic exponential formula
Elements in group III are likely to form
- ionic bonds
- covalent bonds
- metallic bonds
- dative bonds
IGCSE O Level Chemistry Exam Prep Tests
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