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Eighth Grade (Grade 8) Periodic Table and Elements Questions

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Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Which group has a complete outer shell of electrons?
  1. Halogens
  2. Alkali Metals
  3. Nobel Gases
  4. Alkali Earth Metals
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
If atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have                     .
  1. no valence electrons
  2. 7 valence electrons
  3. 8 valence electrons
  4. 17 valence electrons
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Most metals are
  1. solid at room temperature.
  2. bad conductors of electric current.
  3. dull.
  4. not malleable.
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Which of the following best describes the element copper?
  1. Copper is a halogen.
  2. Copper is a metalloid.
  3. Copper is an alkali metal.
  4. Copper is a transition metal.
Grade 8 Periodic Table and Elements
The diagram shows the electron-dot diagram of potassium. What does potassium do with electrons to become stable?
Electron-Dot Diagram - Potassium
  1. It gains 1 valence electron.
  2. It gains 2 valence electrons.
  3. It loses 1 valence electron.
  4. It loses 2 valence electrons.
Grade 8 Periodic Table and Elements
The number of valence electrons in an atom is equal to the
  1. period number.
  2. group number.
  3. atomic mass.
  4. number of neutrons.
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
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