Class 7 Science MCQs - Chapter 2

Atoms and Atom Model Quiz Questions and Answers PDF - 23

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Free Atoms and atom model Quiz Questions and Answers, atoms and atom model Quiz PDF Download, Book Ch. 2-23 to study class 7 science online courses. Download Mass Number and Isotopes MCQs PDF, atoms and atom model quiz questions and answers to study homeschool online courses. The Atoms and Atom Model Quiz App Download: Free learning app for mass number and isotopes, chemical formulas, atoms and elements, ionic bonds, electron levels test prep for online certificate courses.

The Quiz: 'isotope' carbon-12 makes up about; "Atoms and Atom Model" App Download iOS & Android (Free) with answers 80% of carbon on earth, 90% of carbon on earth, 99% of carbon on earth and 89% of carbon on earth to study homeschool online courses. Study mass number and isotopes quiz questions, download Amazon eBook (Free Sample) for free online classes.

Atoms and Atom Model Questions & Answers PDF Download: MCQ Quiz 23

MCQ 111: The 'isotope' carbon-12 makes up about

90% of carbon on earth
80% of carbon on earth
99% of carbon on earth
89% of carbon on earth

MCQ 112: One molecule of carbon dioxide consists of

one carbon and two oxygen atoms
one carbon and oxygen atom
two carbon and one oxygen atom
two carbon and one oxygen atoms

MCQ 113: Atoms of different elements differ from each other because of

difference in color
difference in size
difference in shape
difference in particle numbers

MCQ 114: When salt is formed, sodium

gives an electron to chlorine
takes an electron from chlorine
shares an electron with chlorine
takes a proton from chlorine

MCQ 115: In an atom of carbon, electronic configuration is

2 electrons in K shell and 4 in M shell
2 electrons in L shell and 4 in M shell
2 electrons in K shell and 4 in L shell
4 electrons in K shell and 2 in L shell

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