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Title: What is the symbol for an atomic ion with 126 neutrons and an atomic number of 209? Post by: buffalo on Sep 7, 2012 A nucleus of mass number 209 contains 126 neutrons. An atomic ion of this element has 80 electrons in it. Write the symbol for this atomic ion (give the symbol for the nucleus and give the ionic charge as a right superscript).
Title: What is the symbol for an atomic ion with 126 neutrons and an atomic number of 209? Post by: lforbes21 on Sep 7, 2012 Mass Number 209-Number of Neutrons 126=83 Protons
83 Protons-80 Electrons= +3 Lead's Atomic Number is 209 Pb+3 |