Answer:
It's “Pu.”
Step-by-step explanation:
“Pu” stands for plutonium, the element named for Pluto, back in 1941 it was the newest, teeniest planet in the solar system.
Discovery date 1940
Discovered by Glenn Seaborg and colleagues
Origin of the name Plutonium, is named after the then planet Pluto, following from the two previous elements uranium and neptunium.
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