## Chemistry: The Central Science (13th Edition)

$_{106}^{266}Sg$ has 106 protons, 160 neutrons and 106 electrons
The 106 in the $_{106}^{266}Sg$ notation indicates the element has 106 protons. Electrons and protons are equal, so the element also has 106 electrons. The 266 in the notation is the sum of protons and neutrons, so the element has $266-106=160$ neutrons.