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Eighth Grade (Grade 8) Periodic Table and Elements Questions

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Grade 8 Periodic Table and Elements
The Periodic Table reveals the arrangement of electrons.
  1. True
  2. False
Grade 8 Periodic Table and Elements
Periodic law states that
  1. elements are either gases, solids, or liquids.
  2. mercury is a liquid at room temperature.
  3. the properties of elements change periodically with the elements' atomic numbers.
  4. some elements only stay in a liquid state for short periods.
Grade 8 Periodic Table and Elements
Elements in Groups 1-2 and Groups 13-18 are called                        .
  1. representative elements
  2. synthetic elements
  3. noble gases
  4. actinides
Grade 8 Periodic Table and Elements
What is the process by which one element changes into another element?
  1. half-life
  2. chemical reaction
  3. chain reaction
  4. transmutation
Grade 8 Periodic Table and Elements
Which statement is NOT true?
  1. Oxygen does not burn.
  2. Oxygen supports ordinary combustion.
  3. Oxygen constitutes 80% of the atmosphere.
  4. Oxygen is essential for the existence of living beings.
Grade 8 Periodic Table and Elements
The number of protons has the same value as
  1. the atomic mass.
  2. the atomic number.
Grade 8 Periodic Table and Elements
Oxygen has 2 electron shells.
  1. True
  2. False
Grade 8 Periodic Table and Elements
A balloon filled with hydrogen rises because                             .
  1. the gas is combustible
  2. hydrogen has a high density
  3. the air is very light
  4. hydrogen is a very light gas
Grade 8 Periodic Table and Elements
Chemical reactivity is defined by the element's number of protons.
  1. True
  2. False
Grade 8 Periodic Table and Elements
The color of the flame when sulfur burns in oxygen is                .
  1. blue
  2. yellow
  3. red
  4. white
Grade 8 Periodic Table and Elements
Who had the idea that everything on Earth was made of basic elements?
  1. Greek
  2. Romans
  3. Americans
Grade 8 Periodic Table and Elements
What element in the Chalcogen group is a metal?
  1. Selenium
  2. Polonium
  3. Sulfur
  4. Tellurium
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