(Solved): 96. Plutonium-239 is used in nuclear bombs. Determine the number of protons and neutrons in plu ...

96. Plutonium-239 is used in nuclear bombs. Determine the number of protons and neutrons in plutonium-239 and write its symbol in the form $${\mathrm{Z}}_{\mathrm{A}}\mathrm{X}$$. 98. Silicon has three naturally occurring isotopes: Si-28 with mass $$27.9769$$ amu and a natural abundance of $$92.21\%$$, Si-29 with mass $$28.9765$$ amu and a natural abundance of $$4.69\%$$, and Si-30 with mass $$29.9737$$ amu and a natural abundance of $$3.10\%$$. Calculate the atomic mass of silicon.