Symbol for an element or ion is as follows:
Atomic # = # of protons = # of electrons (neutral element)
Atomic mass = # of protons + # of neutrons
# of neutrons = 226 - 86 = 138 neutrons
You may want to reference (Pages 56 - 61)Section 2.6 while completing this problem. (Determine the number of neutrons and number of protons)
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