Grade 7 English MCQs

Atoms and Atom Model Multiple Choice Questions Test 23 Tests pdf Download

Practice science test 23 on atoms and atom model MCQs, grade 7 mass number and isotopes multiple choice questions and answers. Mass number and isotopes revision test has science worksheets, answer key with choices as 80% of carbon on earth, 90% of carbon on earth, 99% of carbon on earth and 89% of carbon on earth of multiple choice questions (MCQ) with mass number and isotopes quiz as the isotope carbon-12, makes up about for competitive exam prep. Free science study guide to learn mass number and isotopes quiz to attempt multiple choice questions based test.

MCQs on Atoms and Atom Model Quiz pdf Download Worksheets 23

MCQ. Isotope carbon-12, makes up about

  1. 90% of carbon on earth
  2. 80% of carbon on earth
  3. 99% of carbon on earth
  4. 89% of carbon on earth

C

MCQ. One molecule of carbon dioxide consists of

  1. one carbon and two oxygen atoms
  2. one carbon and oxygen atom
  3. two carbon and one oxygen atom
  4. two carbon and oxygen atoms

A

MCQ. Atoms of different elements differ from each other because of

  1. difference in color
  2. difference in size
  3. difference in shape
  4. difference in particle numbers

D

MCQ. When salt is formed, sodium

  1. gives an electron to chlorine
  2. takes an electron from chlorine
  3. shares an electron with chlorine
  4. takes a proton from chlorine

A

MCQ. In an atom of carbon, electronic configuration is

  1. 2 electrons in K shell and 4 in M shell
  2. 2 electrons in L shell and 4 in M shell
  3. 2 electrons in K shell and 4 in L shell
  4. 4 electrons in K shell and 2 in L shell

C