Uuo is the noble gas after Rn. To go from [Rn] to [Uuo], you must fill four subs

Question

Uuo is the noble gas after Rn. To go from [Rn] to [Uuo], you must fill four subshells (s, p, d, and f) with a total of 32 electrons. Thus, the atomic numbers of 6th and 7th period elements of the same group differ by 32. To go from [Uuo] to the next noble gas, however, you would theoretically fill five subshells (s, p, d, f, and g). How many electrons are needed to fill all five subshells? Element 106 in the periodic table is Sg. Determine the atomic number of the element just below Sg in the periodic table.

Explanation / Answer

a)s = 2 ; p = 6 ; d =10 ; f= 14 ; s = 18 ;

so total = 32 +18 = 50 electrons ;

b) 108 + 50 electrons = 158

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