Atoms and Molecules Quiz (ICSE Grade 7)

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Atoms and molecules application based questions

Chanchal Sharma

India

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Atoms and Molecules Quiz (ICSE Grade 7)


Atoms and Molecules Quiz (ICSE Grade 7)Version en ligne Atoms and molecules application based questions par Chanchal Sharma 1 What is the basic unit of matter that makes up elements? a A molecule b A compound c A cell d An atom 2 A molecule is formed when two or more atoms are bonded together. True or false? a False b True c Molecules contain only one atom d Only ions form molecules 3 Which subatomic particle carries a positive charge? a Proton b Positron c Neutron d Electron 4 Which particle orbits the nucleus of an atom? a Neutron b Quark c Proton d Electron 5 What is the atomic number? a Atomic mass b Number of protons in the nucleus c Number of neutrons d Total number of electrons 6 Mass number equals protons plus neutrons. True or false? a Sum of electrons and protons b Number of protons only c False d True 7 What holds atoms together in a molecule? a Electron clouds b Chemical bonds c Ions d Nuclei 8 A compound is a substance formed from two or more elements in fixed proportions. True or false? a Only mixtures are compounds b True c False d It must be a single element 9 How does an element differ from a compound? a An element contains only one type of atom; a compound contains two or more elements. b An element is heavier than a compound c A compound contains only one atom type d An element is always a molecule; a compound is not 10 What is the chemical formula for water? a H2O b HO2 c H2 d O2H