Electron Configuration

Protactinium is the 91st element in the periodic table and the symbol is ‘Pa’. Protactinium has an atomic number of 91, which means that its atom has 91 electrons around its nucleus….

Thorium is the 90th element in the periodic table and the symbol is ‘Th’. Thorium has an atomic number of 90, which means that its atom has 90 electrons around its nucleus….

Actinium is the 89th element in the periodic table and the symbol is ‘Ac’. Actinium has an atomic number of 89, which means that its atom has 89 electrons around its nucleus….

Radium is the 88th element in the periodic table and the symbol is ‘Ra’. Radium has an atomic number of 88, which means that its atom has 88 electrons around its nucleus….

Francium is the 87th element in the periodic table and the symbol is ‘Fr’. Francium has an atomic number of 87, which means that its atom has 87 electrons around its nucleus….

Radon is the 86th element in the periodic table and the symbol is ‘Rn’. Radon has an atomic number of 86, which means that its atom has 86 electrons around its nucleus….

Astatine is the 85th element in the periodic table and the symbol is ‘At’. Astatine has an atomic number of 85, which means that its atom has 85 electrons around its nucleus….

Polonium is the 84th element in the periodic table and the symbol is ‘Po’. Polonium has an atomic number of 84, which means that its atom has 84 electrons around its nucleus….

Bismuth is the 83rd element in the periodic table and the symbol is ‘Bi’. Bismuth has an atomic number of 83, which means that its atom has 83 electrons around its nucleus….

Lead is the 82nd element in the periodic table and the symbol is ‘Pb’. Lead has an atomic number of 82, which means that its atom has 82 electrons around its nucleus….

Thallium is the 81th element in the periodic table and the symbol is ‘Tl’. Thallium has an atomic number of 81, which means that its atom has 81 electrons around its nucleus….

Mercury is the 80th element in the periodic table and the symbol is ‘Hg’. Mercury has an atomic number of 80, which means that its atom has 80 electrons around its nucleus….

Gold is the 79th element in the periodic table and the symbol is ‘Au’. Gold has an atomic number of 79, which means that its atom has 79 electrons around its nucleus….

Platinum is the 78th element in the periodic table and the symbol is ‘Pt’. Platinum has an atomic number of 78, which means that its atom has 78 electrons around its nucleus….

Iridium is the 77th element in the periodic table and the symbol is ‘Ir’. Iridium has an atomic number of 77, which means that its atom has 77 electrons around its nucleus….