Class 7 Science MCQs - Chapter 2
Atoms and Atom Model Multiple Choice Questions (MCQ) PDF - 24
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Atoms and Atom Model Questions & Answers PDF Download: MCQ Quiz 24
MCQ 116: When the transfer of electrons takes place, the sodium and chlorine atoms turn into
- ions
- electrons and protons
- positrons and negatrons
- neutrons and photons
MCQ 117: The activity of organs in a human body can be studied by
- injected medicines in the body
- injected chip in human body
- injected radioisotope in human body
- injected monitors in the body
MCQ 118: In element Uranium-235, the combined number of neutrons and protons is
- 92
- 235
- 35
- 200
MCQ 119: 'Chlorine' becomes an anion because
- it loses a proton
- it gains a proton
- it loses an electron
- it gains an electron
MCQ 120: A material which is made up of one type of atom is known as
- element
- compound
- mixture
- molecule
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