This is a self test for Chapter 3 to help you prepare for the unit test on
Chapters 1 through 3. You may take this self test as many times as
you want.

• 1) Nonmetals are good conductors of heat and electricity.
  True   False
• 2) From left to right in the periodic table, the elements are arranged in order of decreasing
  atomic mass.
  True   False
• 3) The mass of a proton is about one atomic mass unit.
  True   False
• 4) Metals generally become more reactive as you move from left to right across the periodic
  table.
  True   False
• 5) Helium nuclei and energy are the products of the nuclear fusion of the sun's hydrogen.
  True   False
• 6) An element's properties can be predicted from its
  

  symbol
  number of neutrons
  atomic mass
  location in the periodic table
• 7) In the _____ state of matter, electrons are stripped away from the nuclei.
  

  gas
  liquid
  plasma
  solid
• 8) If a substance is ____________, it can be pulled or drawn into a wire.
  

  ductile
  malleable
  magnetic
  reactive
• 9) The sun and many other stars are made mostly of the element _________.
  

  carbon
  hydrogen
  iron
  oxygen
• 10) A(n) ________ is a positively charged particle in an atom's nucleus.
  

  electron
  neutron
  plasma
  proton
• 11) Which of the following is NOT a characteristic of most metals?
  

  brittle
  ductile
  good conductor
  malleable
• 12) An element's ____________ shows the number of protons in its nucleus.
  

  atomic mass
  atomic number
  chemical symbol
  period
• 13) Dmitri Mendeleev created the first
  

  chemical reaction
  metal alloy
  periodic table
  semiconductor
• 14) The particles that are involved in the transfer or sharing between atoms are
  

  plasma
  protons
  neutrons
  valence electrons
• 15) A(n) ___________ has some of the properties of both metals and nonmetals.
  

  alloy
  alkaline earth metal
  metalloid
  noble gas
• 16) When two identical nonmetal atoms are bonded together, the result is a(an) ______________.
  Answer:
• 17) The family of ____________ is the most reactive group of metals in the periodic table.
  Answer:
• 18) The __________ and the _____________are shown at the bottom of the periodic table in order
  to keep the table a reasonable size.
  Answer:
• 19) A row of the periodic table is can a(n) ________________.
  Answer:
• 20) The _____________ family is a very reactive group of mostly nonmetals whose atoms have 7
  valence electrons.
  Answer:
• 21) Discuss some of the chemical properties of oxygen, its occurrence in nature, and its
  importance to life.
  
• 22) Compare and contrast the properties of the alkali metals with the properties of the halogen
  family.
  
• 23) What properties make metalloids useful in making semiconductors?
  
• 24) What is a supernova and how is it related to the matter found on Earth?
  
• 25) Describe three properties of the transition metals.
  
• 26) What information can be found in a square of the periodic table? What does each piece of
  information mean?