Class 7 Online Courses

Chapter 2: Class 7 Science Exam Tests

Class 7 Science MCQs - Chapter 2

Atoms and Atom Model Quiz Questions and Answers PDF - 23

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

Atoms and Atom Model Quiz Questions PDF Download: Science Test 23

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

A) 90% of carbon on earth
B) 80% of carbon on earth
C) 99% of carbon on earth
D) 89% of carbon on earth

MCQ 112: One molecule of carbon dioxide consists of

A) one carbon and two oxygen atoms
B) one carbon and oxygen atom
C) two carbon and one oxygen atom
D) two carbon and one oxygen atoms

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

A) difference in color
B) difference in size
C) difference in shape
D) difference in particle numbers

MCQ 114: When salt is formed, sodium

A) gives an electron to chlorine
B) takes an electron from chlorine
C) shares an electron with chlorine
D) takes a proton from chlorine

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

A) 2 electrons in K shell and 4 in M shell
B) 2 electrons in L shell and 4 in M shell
C) 2 electrons in K shell and 4 in L shell
D) 4 electrons in K shell and 2 in L shell

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6th Grade Science App (Android & iOS)

6th Grade Science App (Android & iOS)