Class 7 Science MCQs - Chapter 1
Atoms and Atom Model Quiz Questions & Answers PDF Download - 23
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The Atoms and atom model Quiz Questions and Answers PDF (atoms and atom model Quiz PDF e-Book) download Ch. 1-23 to learn Grade 7 Science Course. Solve 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 MCQ: The 'isotope' carbon-12 makes up about; "Atoms and Atom Model" App (iOS & Android) with answers: 80% of carbon on earth; 90% of carbon on earth; 99% of carbon on earth; 89% of carbon on earth; to study homeschool online courses. Study Mass Number and Isotopes MCQ Questions, download Amazon eBook (Free Sample) for free online classes.
Atoms and Atom Model Exam Questions and Answers PDF Download: Test 23
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
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
Atoms of different elements differ from each other because of
- difference in color
- difference in size
- difference in shape
- difference in particle numbers
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
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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