atomic number

     

In chemistry an physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. It is traditionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an atom of neutral charge, atomic number is equal to the number of electrons.

Trivia about atomic number

  • Elements in the periodic table are arranged according to this number
  • Bohr was one of the first to see the importance of this, which gives an element's position in the periodic table
  • Francium's is 87
  • In alpha decay a radioactive atom emits 2 protons, making it a new element as this figure drops by 2

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