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Properties of Atoms and the Periodic Table

Practice Test
      
  1.Democritus believed that the universe was made of empty space and __________.  
  a.   elements  
  b.   atoms  
  c.   molecules  
  d.   compounds  
  Hint    
      
  2.The negatively charged particles outside the nucleus of an atom are __________.  
  a.   extracellular material  
  b.   electrons  
  c.   neutrons  
  d.   quarks  
  Hint    
      
  3.The __________ is a chart created by chemists to organize the elements according to repeated changes on properties.  
  a.   periodic table  
  b.   metalloid list  
  c.   isotope  
  d.   mass number  
  Hint    
      
  4.The __________ of an element is the number of __________ of an atom of that element.  
  a.   mass number, neutrons in the nucleus  
  b.   atomic number, protons in the nucleus  
  c.   mass number, protons plus neutrons in the outermost energy level  
  d.   atomic mass, electrons in the nucleus  
  Hint    
      
  5.Which of the following atomic particles is positively charged?  
  a.   neutron  
  b.   negatron  
  c.   proton  
  d.   electron  
  Hint    
      
  6.The atomic number of manganese is 25; its mass number is 55. How many neutrons does an atom of manganese have in its nucleus?  
  a.   80  
  b.   55  
  c.   25  
  d.   30  
  Hint    
      
  7.Who formed the first periodic table?  
  a.   Democritus  
  b.   Moseley  
  c.   Mendeleev  
  d.   Dalton  
  Hint    
      
  8.An atom containing six positive charges and six negative charges has __________ charge.  
  a.   a positive  
  b.   a strong negative  
  c.   a negative  
  d.   no net  
  Hint    
      
  9.Atoms consist of a positively charged center called a(n) __________.  
  a.   nucleus  
  b.   electron  
  c.   neutron  
  d.   proton  
  Hint    
      
  10.Which of the following best describes the three general groups of elements?  
  a.   metals, nonmetals, and noble gases  
  b.   solid, liquid, and gas  
  c.   metals, metalloids, and synthetics  
  d.   metals, metalloids, and nonmetals  
  Hint    
      
  11.Which of the following atomic particles is electrically neutral?  
  a.   proton  
  b.   positron  
  c.   neutron  
  d.   electron  
  Hint    
      
  12.What nineteenth-century English scientist offered proof that atoms existed?  
  a.   Isaac Newton  
  b.   John Dalton  
  c.   Aristotle  
  d.   Democritus  
  Hint    
      
  13.Which of the following methods would be most useful for describing atoms?  
  a.   visualizing with a microscope  
  b.   observing in a test tube  
  c.   touching with bare hands  
  d.   constructing a model  
  Hint    
      
  14.Which of the following models of the atom reflects the unpredictable motion of the electron?  
  a.   small ball within a large shell containing empty space  
  b.   solid ball the same throughout  
  c.   ball of raisin-cookie dough with raisins representing electrons  
  d.   electron cloud  
  Hint    
      
  15.The __________ of an atom is the number of neutrons plus protons.  
  a.   nucleus number  
  b.   half-life  
  c.   atomic number  
  d.   mass number  
  Hint    
      
  16.The mass of an electron is __________.  
  a.   negligible  
  b.   equal to the mass of the nucleus  
  c.   the mass of the neutrons plus the mass of the protons  
  d.   equal to the mass of a proton  
  Hint    
      
  17.Aristotle believed that matter was __________.  
  a.   composed of molecules  
  b.   composed of atoms  
  c.   uniform throughout  
  d.   capable of being broken down into smaller parts  
  Hint    
      
  18.Which of the following is the correct chemical symbol for carbon?  
  a.   Crbn  
  b.   Car  
  c.   C  
  d.   Ca  
  Hint    
      
  19.__________ are atoms of the same element that have different numbers of neutrons.  
  a.   Compounds  
  b.   Isotopes  
  c.   Alpha particles  
  d.   Beta particles  
  Hint    
      
  20.The mass of a proton is measured in __________.  
  a.   microns  
  b.   atomic mass units  
  c.   minutiae  
  d.   nanograms  
  Hint    

 
   
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