Curium-243 undergoes a decay to plutonium-239:²⁴³Cm ⟶²³⁹Pu + α(c) Find the energy released in kJ/mol o \ce{N2(g)}+\ce{O2(g)}\rightarrow \ce{2NO(g)}\quad \Delta H = 181\text{ kJ}
With the atomic number 94 and the chemical symbol Pu, plutonium is a radioactive chemical element. It is an actinide metal with a silvery-gray appearance that oxidizes into a drab coating when exposed to air. Four oxidation states and six allotropes of the element are often present. It combines with silicon, hydrogen, nitrogen, halogens, carbon, and nitrogen. It expands by up to 70% when exposed to moist air due to the formation of oxides and hydrides, which then flake off as pyrophoric powder. Because it is radioactive and can build up in bones, handling plutonium is risky.
By bombarding uranium-238 with deuterons in the 1.5-meter-diameter target in late 1940 and early 1941, the first synthetic production and isolation of plutonium was achieved.
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