An element is isobaric with the inert gas atom \( { }_{18} \mathrm{~A}^{40} \). The electronic a...

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An element is isobaric with the inert gas atom \( { }_{18} \mathrm{~A}^{40} \). The electronic arrangement of the element is \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{~s}^{2} \). How many neutrons does each atom of the element carry in its nucleus?
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