Grade 9 Chemistry Unit Test (multiple Choice)

68 Questions  I  By Smartiecheez
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9th Grade Quizzes & Trivia
A review test that helps review things within the chemistry unti such as, the atoms, ions, past atom theories/models, the periodic table (not every element), chemical and physical change, chemical reaction, chemical formulas, Bohr diagram, graphing results/reactions etc. *Note: You might want to use a periodic table for this Test!

  
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  • 1. 
    Several models of what the atom may have looked like were made. The earliest model, representing the atom as a positively charged sphere in which negatively charged electrons were embedded, was developed by:  
    • A. 

      Bohr

    • B. 

      Thomson

    • C. 

      Nagaoka

    • D. 

      Boyle


  • 2. 
    The Canadian contribution to the study of the atom came about by a scientist who named and studied the nucleus. Who was he?
    • A. 

      Rutherford

    • B. 

      Thomsen

    • C. 

      Chadwick

    • D. 

      Bohr


  • 3. 
    “It’s like shooting a gun shell at a place of tissue paper and it comes back right at you.” These famous words were said by:  
    • A. 

      Dalton

    • B. 

      Thomsen

    • C. 

      Rutherford

    • D. 

      Chadwick


  • 4. 
    Erica was told by her science teacher that ‘amu’ is the basis of the element classification system. The symbol ‘amu’ stands for:  
    • A. 

      Atomic mass unit

    • B. 

      Atomic measurement unit

    • C. 

      Astronomical measurement unit

    • D. 

      Astronomical mass unit


  • 5. 
    Jason noticed that the periodic table had coloured sections. The seven elements between the metal and non-metal sections had their own colour. They represent a group called:
    • A. 

      Halogens

    • B. 

      Metalloids

    • C. 

      Intermediates

    • D. 

      Mid-elements


  • 6. 
    Ashton noticed that Cu, Zn and Ga are in the same horizontal row in the periodic table. She concluded that these three elements belong to the same:
    • A. 

      Family

    • B. 

      Period

    • C. 

      Group

    • D. 

      Section


  • 7. 
    What does the atomic number of an atom represent?  
    • A. 

      Protons and electrons

    • B. 

      Protons and neutrons

    • C. 

      Neutrons and electrons

    • D. 

      Electrons and shells


  • 8. 
    A chemistry poster indicated information on the number of particles in a newly discovered atom. According to the information in the poster the atomic number is:  Protons: 113      Electrons: 113     Neutrons: 281                      
    • A. 

      113

    • B. 

      226

    • C. 

      394

    • D. 

      507


  • 9. 
    As you move from the left side of the periodic table to the right side the elements become:  
    • A. 

      Less metallic

    • B. 

      Liquid

    • C. 

      More conductive

    • D. 

      Solid in state


  • 10. 
    Water (H20) is a common compound made up of:
    • A. 

      3 elements and a total of 3 atoms

    • B. 

      2 elements and a total of 2 atoms

    • C. 

      3 elements and a total of 2 atoms

    • D. 

      2 elements and a total of 3 atoms


  • 11. 
    The numbers 3 and 8 in the chemical formula for propane, C3H8, are given a special name. They are called:
    • A. 

      Subscripts

    • B. 

      Equations

    • C. 

      Coefficients

    • D. 

      Atomic numbers


  • 12. 
    NaHCO3 indicates one molecule of baking soda and best represents the _____ for baking soda.  
    • A. 

      Chemical name

    • B. 

      Chemical equation

    • C. 

      Chemical formula

    • D. 

      Chemical symbol


  • 13. 
    A simple volcano demonstration in a science fair project requires that vinegar be mixed with baking soda. The result is bubbling and fizzing. The carbon dioxide produced in this reaction is the most accurately written as:  
    • A. 

      CO2

    • B. 

      CO2(g)

    • C. 

      CO2(s)

    • D. 

      CO2(l)


  • 14. 
    How many elements are present in two molecules of aspirin? The formula for aspirin is C9H8O4.
    • A. 

      3

    • B. 

      6

    • C. 

      21

    • D. 

      42


  • 15. 
    Vitamin C identified by the chemical formula C6H8O6 (s) has:
    • A. 

      6 carbon atoms, 8 helium atoms, and 6 oxygen atoms

    • B. 

      6 calcium atoms, 8 hydrogen atoms, 6 oxygen atoms

    • C. 

      6 calcium atoms, 8 hydrogen atoms, and 6 osmium atoms

    • D. 

      6 carbon atoms, 8 hydrogen atoms, and 6 oxygen atoms


  • 16. 
    Angelo required an aqueous solution of sodium chloride. He made the solution by dissolving salt in:
    • A. 

      Vinegar

    • B. 

      Air

    • C. 

      Oxygen gas

    • D. 

      Water


  • 17. 
    Most atoms are neutral. To become a positive ion the atom must:
    • A. 

      Gain electrons

    • B. 

      Gain electrons and protons

    • C. 

      Lose electrons

    • D. 

      Lose electrons and protons


  • 18. 
    Molecular compounds can be found in all three states of matter at room temperature. Which molecule compound is a liquid at room temperature?
    • A. 

      Rubbing alcohol

    • B. 

      Sugar

    • C. 

      Carbon dioxide

    • D. 

      Methane


  • 19. 
    What is an atom?
    • A. 

      Largest part of a element

    • B. 

      Smallest part of a element

    • C. 

      Larger than a substance

    • D. 

      Part of the nucleus


  • 20. 
    What does an atom represent?
    • A. 

      The pure substance

    • B. 

      A compound

    • C. 

      A element

    • D. 

      A ion


  • 21. 
    What are the parts of an atom?
    • A. 

      Nucleus, element, carbon, space

    • B. 

      Ions, electrons, neutrons, water

    • C. 

      Protons, neutrons, electrons, nucleus

    • D. 

      Protons, neutrons, nucleus, mass


  • 22. 
    What is the key idea of the Bohr Model?
    • A. 

      Explained that there was a nucleus

    • B. 

      Explained that atoms are hard to see with the naked eye

    • C. 

      That an atom was like a raisin bean bun

    • D. 

      There are electrons inside the atom that orbit the nucleus


  • 23. 
    Since atoms are neutral, the number of electrons is equal to the number of:
    • A. 

      Neutrons

    • B. 

      Protons

    • C. 

      Nucleus

    • D. 

      Ions


  • 24. 
    How do you calculate the number of neutrons in an atom?
    • A. 

      The atomic mass plus the number of protons

    • B. 

      The atomic mass subtracted the number of protons

    • C. 

      The atomic mass plus the number of electrons

    • D. 

      The atomic mass subtracted the number of electrons


  • 25. 
    How many  electrons max. are allowed in the 1st, 2nd and 3rd shell in a Bohr Diagram?
    • A. 

      1st: 2 2nd: 4 3rd: 4

    • B. 

      1st: 2 2nd: 5 3rd: 7

    • C. 

      1st: 3 2nd: 9 3rd: 9

    • D. 

      1st: 2 2nd: 8 3rd: 8


  • 26. 
    What is an element?
    • A. 

      A pure substance made up of one type of atom

    • B. 

      A pure substance made up of 2 or more types of atoms

    • C. 

      The periodic table

    • D. 

      A compound made up of 1 type of element


  • 27. 
    What is a compound?
    • A. 

      A pure substance made up of one type of atom

    • B. 

      Pure substances made up of 2 or more types of atoms

    • C. 

      Made up of 10 atoms

    • D. 

      Two words in one word


  • 28. 
    What are chemical formulas used to represent?
    • A. 

      Atoms

    • B. 

      Compounds

    • C. 

      Elements

    • D. 

      Symbols


  • 29. 
    What is the formula for a solid state at room temperature?
    • A. 

      Hg (l)

    • B. 

      NH3 (g)

    • C. 

      CaCO3 (s)

    • D. 

      NaCl (aq)


  • 30. 
    What is the formula for a liquid at room temperature?
    • A. 

      Hg (l)

    • B. 

      NH3 (g)

    • C. 

      NaCl (aq)

    • D. 

      CaCO3 (s)


  • 31. 
    What is the formula for a gas at room temperature?
    • A. 

      Hg (l)

    • B. 

      NH3 (g)

    • C. 

      CaCO3 (s)

    • D. 

      NaCl (aq)


  • 32. 
    What is the formula for a aqueous solution at room temperature?
    • A. 

      Hg (l)

    • B. 

      NH3 (g)

    • C. 

      NaCl (aq)

    • D. 

      CaCO3 (s)


  • 33. 
    What do atoms like to have?
    • A. 

      Full shells

    • B. 

      18 electrons

    • C. 

      1 shell

    • D. 

      Positive ions


  • 34. 
    Non-metals like to _____ electrons to become ______ ions.
    • A. 

      Lose, negative

    • B. 

      Lose, positive

    • C. 

      Gain, negative

    • D. 

      Gain, positive


  • 35. 
    Metals like to _____ electrons to become ____ ions.
    • A. 

      Lose, positive

    • B. 

      Lose, negative

    • C. 

      Gain, negative

    • D. 

      Gain, negative


  • 36. 
    Ions in the same group like to have _____ charge.
    • A. 

      The same

    • B. 

      A different

    • C. 

      A neutral

    • D. 

      No


  • 37. 
    What are the 2 different types of ions?
    • A. 

      Polyatomic and compound ions

    • B. 

      Polyatomic and multivalent

    • C. 

      Negative and positive

    • D. 

      Electrons and protons


  • 38. 
    What is a polyatomic ion?
    • A. 

      Ions made of 3 types of atom that act as 2 ions

    • B. 

      Ions that have 2 or more atoms

    • C. 

      Ions that are made of more than 1 type of atom and act as one

    • D. 

      Ions that have 5 different types of atoms


  • 39. 
    What is a multivalent ion?
    • A. 

      Ions that are made of more than 1 type of atom and act as one

    • B. 

      Some ions can have only one charge

    • C. 

      Only negatively charged

    • D. 

      An ion that can have more than one charge


  • 40. 
    What do you call pure substances that are formed from the attraction between positive ions and negative ions?  
    • A. 

      Ionic substances

    • B. 

      Ionic compounds

    • C. 

      Ionic atoms

    • D. 

      Ionic charges


  • 41. 
    What are characteristics do a ionic compound have? Choose 4.
    • A. 

      Held together by strong electrostatic forces

    • B. 

      Creates energy (heat)

    • C. 

      High melting and boiling points

    • D. 

      Forms solid crystals

    • E. 

      2 negative ions attract

    • F. 

      Conducts electricity when dissolved in water


  • 42. 
    Balance the charges in the ionic compound Magnesium Chloride, the new formula would be:
    • A. 

      Cl1Mg2

    • B. 

      Cl2Mg

    • C. 

      MgCl2

    • D. 

      Mg2Cl


  • 43. 
    What are the 2 types of compounds?
    • A. 

      Ionic and molecular

    • B. 

      Covalent and incovalent

    • C. 

      Metals and non-metals

    • D. 

      Substances and compounds


  • 44. 
    How are ionic compounds formed?
    • A. 

      Formed from positive and negative ions

    • B. 

      Formed from atoms

    • C. 

      Formed when positive metal ions attract to negative non-metal ions

    • D. 

      Formed when positive non-metals attract to negative metal ions


  • 45. 
    How is a molecular/covalent compound formed?
    • A. 

      Formed when elements are combined

    • B. 

      Formed when non metals gain electrons

    • C. 

      Formed when metal atoms share electrons to complete the outer shell

    • D. 

      Formed when non-metal atoms share electrons to complete the outer shell


  • 46. 
    What are some characteristics that molecular compounds have? Choose 3.
    • A. 

      Weak bonds

    • B. 

      Strong bonds

    • C. 

      High melting and boiling points

    • D. 

      Low melting and boiling points

    • E. 

      Conductivity

    • F. 

      No conductivity


  • 47. 
    Name the molecular compound, CBr4 properly.

  • 48. 
    Some potassium oxide was placed in 9g of water. 112g of potassium hydroxide was produced. What mass of potassium oxide was used?

  • 49. 
    What type of change is this: A blue green lobster turned red as it cooked.
    • A. 

      Physical

    • B. 

      Chemical


  • 50. 
    Which of these properties are extremely reactive and are silvered coloured and shiny?
    • A. 

      Transition Metals

    • B. 

      Alkaline-earth Metals

    • C. 

      Alkali Metals

    • D. 

      Halogens


  • 51. 
    Which of these properties are slightly less reactive than Alkali Metals?
    • A. 

      Alkali Metals

    • B. 

      Transition Metals

    • C. 

      Lanthanides

    • D. 

      Alkali-earth Metals


  • 52. 
    Which of these properties are shiny and good conductors of heat and electricity?
    • A. 

      Actinides

    • B. 

      Transition Metals

    • C. 

      Metalloids

    • D. 

      Alkali Metals


  • 53. 
    Which of these properties are radioactive?
    • A. 

      Actinides

    • B. 

      Metalloids

    • C. 

      Halogens

    • D. 

      Lanthanides


  • 54. 
    Which of these properties are all non-metals and tend to create salts with metals?
    • A. 

      Lanthanides

    • B. 

      Halogens

    • C. 

      Metalloids

    • D. 

      Noble Gases


  • 55. 
    Which of these properties are uncreative, colourless and odourless in room temperature?
    • A. 

      Metalloids

    • B. 

      Halogens

    • C. 

      Noble Gases

    • D. 

      Oxygen


  • 56. 
    The vertical columns on the periodic table are called _______.
    • A. 

      Metals

    • B. 

      Non-metals

    • C. 

      Periods

    • D. 

      Groups/families


  • 57. 
    The horizontal rows on the periodic table are called _______.
    • A. 

      Gases

    • B. 

      Solids

    • C. 

      Periods

    • D. 

      Families


  • 58. 
    What does the word ‘atom’ mean?

  • 59. 
    How many naturally occuring elements exist?

  • 60. 
    In the periodic table the element chlorine appears in a box containing important information. What does the number 17 in the box indicate?   
    • A. 

      Atomic mass

    • B. 

      Ionic charge

    • C. 

      Atomic symbol

    • D. 

      Atomic number


  • 61. 
    What are the 4 types of reactions?
    • A. 

      Flammable

    • B. 

      Poisonous

    • C. 

      Combustion

    • D. 

      Neutralization

    • E. 

      Explosive

    • F. 

      Corrosion

    • G. 

      Toxic

    • H. 

      Cellular Respiration

    • I. 

      Compensation


  • 62. 
    The chemical formula for copper (II) sulfate is CuSO4. The total number of atoms in one molecule of copper (II) sulfate is:
    • A. 

      7

    • B. 

      6

    • C. 

      4

    • D. 

      3


  • 63. 
    The change that occurs when a substance changes from a solid to a gas is referred to as:  
    • A. 

      Deposition

    • B. 

      Sublimation

    • C. 

      Vaporization

    • D. 

      Condensation


  • 64. 
    The change that occurs when a substance changes from a gas to a solid is referred to as:
    • A. 

      Deposition

    • B. 

      Sublimation

    • C. 

      Vaporization

    • D. 

      Condensation


  • 65. 
    Which of these mixtures are difficult to separate and is a cloudy mixture?
    • A. 

      Colloids

    • B. 

      Suspensions

    • C. 

      Solutions

    • D. 

      Mechanical Mixture


  • 66. 
    Which of these mixtures are easily separated with a filter and is a cloudy mixture?
    • A. 

      Colloids

    • B. 

      Suspensions

    • C. 

      Solutions

    • D. 

      Mechanical Mixture


  • 67. 
    Which of these mixtures are mixed so well that the mixture looks like a substance (homogenous)?
    • A. 

      Colloids

    • B. 

      Suspensions

    • C. 

      Solutions

    • D. 

      Mechanical Mixture


  • 68. 
    Which of these mixtures can you easily see the different parts of it without a microscope (heterogeneous)?
    • A. 

      Colloids

    • B. 

      Suspensions

    • C. 

      Solutions

    • D. 

      Mechanical Mixture


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