Unit 6 - Test(chemical Compound)

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Unit 6 - Test(chemical Compound)

In chemistry, a compound refers to an entity that consists of two or more atoms, with at least two of those atoms from different chemical elements. These atoms associate via chemical bonds. What else can you tell us about compounds?


Questions and Answers
  • 1. 
    The elements that make up a compound and the number of atoms of each element in a unit of a compound can be shown in a ______.
    • A. 

      Chemical symbol

    • B. 

      Chemical formula

    • C. 

      Subscript

    • D. 

      Superscript

  • 2. 
    A group of atoms that act together as one charged atom is a ______.
    • A. 

      Polyatomic ion

    • B. 

      Negative ion

    • C. 

      Molecule

    • D. 

      Crystal

  • 3. 
    In chemical formulas, the number of atoms in a unit of the compound is shown by numbers called ______.
    • A. 

      Oxidation numbers

    • B. 

      Superscripts

    • C. 

      Hydrates

    • D. 

      Subscripts

  • 4. 
    A chemical bond that occurs when atoms share electrons is a(n) ______ bond.
    • A. 

      Ionic

    • B. 

      Covalent

    • C. 

      Polyatomic

    • D. 

      Magnetic

  • 5. 
    The name given to the number of electrons an atom gains, loses, or shares is the _____.
    • A. 

      Ionic number

    • B. 

      Atomic number

    • C. 

      Oxidation number

    • D. 

      Atomic mass

  • 6. 
    What is the name of a binary compound made up of lithium and chlorine?
    • A. 

      Chloride lithium

    • B. 

      Lithium chlorate

    • C. 

      Lithium chloride

    • D. 

      Chlorine lithiate

  • 7. 
    What kind of chemical bond is formed when electrons are transferred from one atom to another atom?
    • A. 

      Ionic

    • B. 

      Covalent

    • C. 

      Magnetic

    • D. 

      Hydrate

  • 8. 
    The sum of the oxidation numbers is a neutral compound is always ______.
    • A. 

      One

    • B. 

      Zero

    • C. 

      A positive number

    • D. 

      A negative number

  • 9. 
    Why do the noble gases NOT form compounds readily?
    • A. 

      They have no electrons.

    • B. 

      They have empty outer energy levels.

    • C. 

      They have seven electron in their outer energy levels.

    • D. 

      Their outer energy levels are completely filled with electrons.

  • 10. 
    What is the name of the compound with the formula NaCl?
    • A. 

      Sodium chloride

    • B. 

      Chlorine sodiate

    • C. 

      Sodium dichloride

    • D. 

      Sodium chlorate

  • 11. 
    How many hydrogen atoms are present in one molecule of ammonium acetate, NH4C2H3O2?
    • A. 

      3

    • B. 

      4

    • C. 

      7

    • D. 

      11

  • 12. 
    The oxidation number of an atom is shown with a _____.
    • A. 

      Subscript

    • B. 

      Positive number

    • C. 

      Superscript

    • D. 

      Negative number

  • 13. 
    What is the total number of atoms in a compound Ca(ClO3)2?
    • A. 

      2

    • B. 

      3

    • C. 

      6

    • D. 

      9

  • 14. 
    Use the table to answer the following question. Which of the following is the correct formula for magnesium nitrate?
    • A. 

      MgNO3

    • B. 

      Mg2NO3

    • C. 

      Mg(NO3)2

    • D. 

      Mg2(NO3)2

  • 15. 
    Use the table to answer the following question. What is the charge of the phosphate in K3PO4?
    • A. 

      3-

    • B. 

      1+

    • C. 

      5+

    • D. 

      7-

  • 16. 
    • A. 

      One potassium and two oxygen

    • B. 

      Two potassium and one oxygen

    • C. 

      One potassium and one oxygen

    • D. 

      Three potassium and one oxygen

  • 17. 
    Use the table to answer the following question. What is the correct name for K2SO4?
    • A. 

      Potassium sulfide

    • B. 

      Potassium (II) sulfate

    • C. 

      Potassium sulfate

    • D. 

      Potassium disulfide

  • 18. 
    Use the table to answer the following question. What is the correct formula for magnesium oxide?
    • A. 

      MgO

    • B. 

      MgO2

    • C. 

      Mg2O2

    • D. 

      Mg2O

  • 19. 
    Use the table to answer the following question. What is the name of the compound with the formula CaO?
  • 20. 
    Use the table to answer the following question. What is the name of the compound with the formula MgCl2?
  • 21. 
    The properties of a compound are the same as the properties of the elements making up the compound.
    • A. 

      True

    • B. 

      False

  • 22. 
    Because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a nonpolar molecule.
    • A. 

      True

    • B. 

      False

  • 23. 
    Molecules are neutral.
    • A. 

      True

    • B. 

      False

  • 24. 
    The term anhydrous means without water.
    • A. 

      True

    • B. 

      False

  • 25. 
    Particles formed from the covalent bonding of atoms are called ions.
    • A. 

      True

    • B. 

      False

  • 26. 
    When atoms gain or lose electrons, the charged particles that result are called ions.
    • A. 

      True

    • B. 

      False

  • 27. 
    Write the name for the following compound: CaBr2
  • 28. 
    Write the name for the following compound: CuCl
  • 29. 
    Write the name for the following compound: MgS
  • 30. 
    Write the formula for the following compound: copper (I) sulfide *You will not be able to make a subscript. Write in the number where it belongs.
  • 31. 
    Write the formula for the following compound: calcium chloride *You will not be able to make a subscript. Write in the number where it belongs.
  • 32. 
    Write the formula for the following compound: calcium oxide