Quiz  /  Atomic Structure Class 9 MCQ Questions With Answers

  • 1. 
    The _________ of an element equals the number of protons in an atom of that element.

  • mass number
  • atomic weight
  • atomic number
  • isotopes

  • 2. 
    What element does the Bohr Model represent?

  • Nitrogen
  • Potassium
  • Sodium

  • 3. 
    What is atomic number?

  • Number of protons in an atoms
  • Number of neutrons in an atom
  • Mass of an atom
  • Charge on an atom

  • 4. 
    Complete the missing label on the diagram.

  • Neutron
  • Centre
  • Nucleus
  • Sub atomic particle

  • 5. 
    What mass does a neutron have?

  • 1 amu
  • 0 amu
  • -1 amu
  • +2 amu

  • 6. 
    The total number of protons and neutrons in an atom is called the...

  • Atomic number
  • Proton number
  • Mass number
  • Weight number

  • 7. 
    If an element has 14 protons, 15 neutrons, and 14 electrons, what is that elements atomic mass

  • 28
  • 14
  • 29
  • All of above

  • 8. 
    How many neutrons does a silver atom with a mass of 108 amu have?

  • 47
  • 108
  • 61
  • 108

  • 9. 
    Alkali metals are located where on the periodic table?

  • Group (column 1)
  • Group 8 and Period 4
  • Period 7
  • None of these

  • 10. 
    Alkaline Earth Metals...

  • are semiconductors
  • are the most reactive type of elements
  • have two valence electrons
  • All of above

  • 11. 
    What element is represented in this Bohr Model?

  • Carbon
  • Hydrogen
  • Aluminum
  • Lithium

  • 12. 
    The horizontal rows of the periodic table

  • Groups
  • Periods
  • Families

  • 13. 
    Which particle is negatively charged?

  • proton
  • atom
  • neutron
  • electron

  • 14. 
    What element has 9 protons, 9 electrons, and 10 neutrons?

  • nitrogen
  • oxygen
  • fluorine
  • neon

  • 15. 
    Which subatomic particles are found in the nucleus of an atom?

  • Protons and Electrons
  • Protons and Neutrons
  • Neutrons and Electrons
  • Protons, Neutrons and Electrons

  • 16. 
    The smallest possible unit matter can be divided into while still maintaining its properties.

  • Proton
  • Atom
  • Element

  • 17. 
    Atoms of the same element must always have the same number of _________

  • electrons
  • neutrons
  • isotopes
  • protons

  • 18. 
    What is the correct number of subatomic particles of a phosphorous atom with a mass of 31?

  • p# - 15, n# = 15, e# = 15
  • p# - 15, n# = 16, e# = 15
  • p# - 15, n# = 15, e# = 16
  • p# - 16, n# = 15, e# = 15

  • 19. 
    The area of the atom where protons and neutrons are found

  • Electron Cloud
  • Nucleus
  • Energy Level

  • 20. 
    The vertical rows of the periodic table, also called families

  • Groups
  • Periods
  • Rows

  • 21. 
    What is the atomic number of a chlorine atom with a mass of 35 amu?

  • 17
  • 35
  • 18
  • 52

  • 22. 
    How many electrons does a sodium atom have?

  • 9
  • 15
  • 11
  • 13

  • 23. 
    The arrangement of elements in order of increasing atomic number

  • Periodic Table
  • Atomic Number List
  • Bohr Model

  • 24. 
    Is the number below the element symbol on the periodic table the mass number?

  • Yes!
  • NO!!

  • 25. 
    A positively charged particle found in the nucleus of the atom

  • Proton
  • Electron
  • Neutron

  • 26. 
    The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

  • mass number
  • atomic number
  • atomic weuight
  • isotope weight

  • 27. 
    How many protons does an aluminum atom have?

  • 27
  • 14
  • 40
  • 13
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