An element has atomic number 115. where will you place this element in the modern periodic table?

Number of elements till sixth period = 2+8+8+18+18+32=86
Number of extra electrons in the atom with atomic number 115= 115 – 86 = 29
Configuration of the seventh period with 29 electrons will be 7s25f146d107p3

Element with atomic number will be found at the cross of 15th group, seventh period.

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