IGCSE O Level Chemistry Entrance Exam MCQs – Mock Test 13

Proton and Nucleon Number Quiz with Answers PDF Download – Test 13

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Free Proton & Nucleon Number Study App Download: "If the nucleon (mass) and proton (atomic) number is 40 and 20 respectively, the element is"; MCQ with answers: phosphorus, chlorine, calcium, and potassium. Study Structure of Atom Questions and Answers, Apple iBook to download free chapter to access chemistry courses.

Proton & Nucleon Number Quiz – Mock Test 13 PDF Download

MCQ 61: If the nucleon (mass) and proton (atomic) number is 40 and 20 respectively, the element is:

chlorine
phosphorus
potassium
calcium

MCQ 62: All are covalent compounds except:

NO₂
SO₃
SO₂
HNO₃

MCQ 63: 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

MCQ 64: The empirical formula is the:

simplest formula
molecular formula
chemical formula
ionic exponential formula

MCQ 65: Elements in group III are likely to form:

ionic bonds
covalent bonds
metallic bonds
dative bonds

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