Class 9 Chemistry Exam MCQs – Practice Test 4 (Chapter 7)

Structure of Atoms Notes Questions with Answers PDF Download – Test 4

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Structure of Atoms MCQs – Practice Test 4 PDF Download

MCQ 16: α particles are:

positively charged
doubly positively charged
negatively charged
doubly negatively charged

MCQ 17: The energy of emitted light is equal to:

sum of energy levels
difference between energies of orbits
product of energies of orbits
none of above

MCQ 18: Atoms having same atomic number but different atomic mass are called:

derivatives
isotopes
elements
isomers

MCQ 19: Rutherford bombarded thin gold foil with:

α particles
β particles
γ particles
neutrons

MCQ 20: Iodine-123 is used to:

diagnose thyroid problem
image the brain
kill cancer cells
trace the blood flow

Structure of Atoms Exam Prep – Class 9 Chemistry Notes App & e-Book

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