Problem: The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266.How many protons, electrons, and neutrons are in an 266Sg atom?

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We’re being asked to determine the number of protons, electrons, and neutrons in 266Sg.


An element can be represented as:

Where: 

Atomic number (Z): 

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The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266.

How many protons, electrons, and neutrons are in an 266Sg atom?