The symbol for a certain isotope of polonium is $^{214}_{84}$Po. How many neutrons are there in the nucleus of this isotope?

Question

Quizplus · Accepted Answer

The number in the upper left corner (214) represents the total number of protons and neutrons in the nucleus. The number in the lower left corner (84) represents the number of protons and thus the atomic number. To find the number of neutrons, subtract the atomic number (84) from the total number of protons and neutrons (214):

214 - 84 = 130 
Therefore, there are 130 neutrons in the nucleus.

The Symbol for a Certain Isotope of Polonium Is 84214^{214}_{84}84214​ Po How Many Neutrons Are There in the Nucleus of Po

The Symbol for a Certain Isotope of Polonium Is $^{214}_{84}$ Po How Many Neutrons Are There in the Nucleus of Po