The lightest chemical elements include _______.
  • lead, mercury, copper and arsenic
  • carbon, nitrogen and oxygen
  • helium, hydrogen, lithium and beryllium
  • earth, air, water and fire
The periodic table only contains _________.
  • protons
  • chemical elements
  • atoms
  • electrons
The means by which all chemical elements are organized based on their atomic number, electron configurations and their recurring chemical properties is called the _________.
  • periodic table
  • subatomic particles
  • chemical reaction
  • metalloids
Of the confirmed elements ____ occur naturally.
  • 98
  • 114
  • 117
  • 118
This is the distribution of electrons found in an atom or molecule.
  • Catalyst
  • Orbital fashion
  • Synthesis
  • Electron configuration
The rows found in the periodic table are referred to as _____.
  • molecules
  • grids
  • periods
  • groups
What are the four common elements?
  • Helium, hydrogen, lithium and beryllium
  • Earth, air, water and fire
  • Elements 113, 115, 117 and 118
  • Lead, mercury, copper and arsenic
The number of protons in the nucleus of an atom is known as the _______.
  • atomic number
  • catalyst
  • compounds
  • electrons
He has been credited with publication of the periodic table in 1869.
  • Aristotle
  • Robert Hooke
  • Carl Linnaeus
  • Dmitri Mendeleev
The columns found in the periodic table are known as ______.
  • atomic number
  • groups
  • grids
  • molecules
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