A. Electron
B. Proton
C. Neutron
D. Positron

Elements are placed in order on the periodic table based on their atomic number, how many protons they have. In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number. In addition, the position of an element in the periodic table—its column, or group, and row, or period—provides useful information about how those electrons are arranged.



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5 Comments to “The position of an element in the Periodic Table is determined by its __________ number?”
  1. i think the electron would be the most appropriate atomic particle that should determine the position of an element on thr periodic table since we use the outermost electrons or valence electrons to determine the group of an element.

  2. The appropriate answer should be Atomic Number as Atomic Number reflects number of Electrons or Protons of an atom. Since, in Periodic Table, all Elements are in atomic state, so atomic number should be the correct and appropriate answer.

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