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STRUCTURE OF ATOM MCQs

Total Questions : 18 | Page 2 of 2 pages
Question 11. What does the nucleus consist of?
  1.    Protons + Electrons
  2.    Neutrons + Electrons
  3.    Atoms
  4.    Protons + Neutrons
 Discuss Question
Answer: Option D. -> Protons + Neutrons
Question 12. Which particle has a similar mass to a proton?
  1.    Electron
  2.    Neutron
  3.    Photon
  4.    Marble
 Discuss Question
Answer: Option B. -> Neutron
Question 13. The first energy level can hold up to, how many electrons?
  1.    8
  2.    4
  3.    2
  4.    5
 Discuss Question
Answer: Option C. -> 2
Question 14. Particles in an atom that are neutral and have no charge are
  1.    negatrons 
  2.    electrons 
  3.    neutrons 
  4.    protons 
 Discuss Question
Answer: Option C. -> neutrons 
Question 15. Which statement best describes an electron?
  1.    Smaller mass than a proton and a negative charge
  2.    Smaller mass than a proton and a positive charge
  3.    Greater mass than a proton and a negative charge
  4.    Greater mass than a proton and a positive charge
 Discuss Question
Answer: Option A. -> Smaller mass than a proton and a negative charge
Question 16. How many protons, electrons and neutrons does an neutral atom of Calcium have? Its atomic number is 20 and the mass number is 40
  1.    20 protons, 18 electrons and 40 neutrons
  2.    20 protons, 20 electrons and 20 neutrons
  3.    40 protons, 40 electrons and 20 neutrons
  4.    20 protons, 18 electrons and 20 neutrons
 Discuss Question
Answer: Option B. -> 20 protons, 20 electrons and 20 neutrons
Question 17. An element with a mass number of 10 and an atomic number of 6 has how many protons?
  1.    5
  2.    8
  3.    6
  4.    10
 Discuss Question
Answer: Option C. -> 6
Question 18. Which of the following is not possible?
  1.    n=3, l=2, m=0
  2.    n=1, l=0, m=0
  3.    n=3, l=3, m=2
  4.    n=4, l=3, m=-3
 Discuss Question
Answer: Option C. -> n=3, l=3, m=2

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