Plutonium (Pu) is a chemical element of the periodic table, located in the period 7, and has the atomic number 94. It is the sixth element in the actinide series. It is a bright, silvery-white metal that turns gray or yellow tarnish, when it is exposed to air. It is named after the planet Pluto. It is the second transuranium element and is counted as one of the radioactive elements.
| group | ⇨ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| period | ⇩ | ||||||||||||||||||
| 1 | 1 H  Hydrogen |
2 He  Helium |
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| 2 | 3 Li  Lithium |
4 Be  Beryllium |
5 B  Boron |
6 C  Carbon |
7 N  Nitrogen |
8 O  Oxygen |
9 F  Fluorine |
10 Ne  Neon |
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| 3 | 11 Na  Sodium |
12 Mg  Magnesium |
13 Al  Aluminium |
14 Si  Silicon |
15 P  Phosphorus |
16 S  Sulfur |
17 Cl  Chlorine |
18 Ar  Argon |
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| 4 | 19 K  Potassium |
20 Ca  Calcium |
21 Sc  Scandium |
22 Ti  Titanium |
23 V  Vanadium |
24 Cr  Chromium |
25 Mn  Manganese |
26 Fe  Iron |
27 Co  Cobalt |
28 Ni  Nickel |
29 Cu  Copper |
30 Zn  Zinc |
31 Ga  Gallium |
32 Ge  Germanium |
33 As  Arsenic |
34 Se  Selenium |
35 Br  Bromine |
36 Kr  Krypton |
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| 5 | 37 Rb  Rubidium |
38 Sr  Strontium |
39 Y  Yttrium |
40 Zr  Zirconium |
41 Nb  Niobium |
42 Mo  Molybdenum |
43 Tc  Technetium |
44 Ru  Ruthenium |
45 Rh  Rhodium |
46 Pd  Palladium |
47 Ag  Silver |
48 Cd  Cadmium |
49 In  Indium |
50 Sn  Tin |
51 Sb  Antimony |
52 Te  Tellurium |
53 I  Iodine |
54 Xe  Xenon |
|
| 6 | 55 Cs  Caesium |
56 Ba  Barium |
72 Hf  Hafnium |
73 Ta  Tantalum |
74 W  Tungsten |
75 Re  Rhenium |
76 Os  Osmium |
77 Ir  Iridium |
78 Pt  Platinum |
79 Au  Gold |
80 Hg  Mercury |
81 Tl  Thallium |
82 Pb  Lead |
83 Bi  Bismuth |
84 Po  Polonium |
85 At  Astatine |
86 Rn  Radon |
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| 7 | 87 Fr  Francium |
88 Ra  Radium |
104 Rf  Rutherfordium |
105 Db  Dubnium |
106 Sg  Seaborgium |
107 Bh  Bohrium |
108 Hs  Hassium |
109 Mt  Meitnerium |
110 Ds  Darmstadtium |
111 Rg  Roentgenium |
112 Cn  Copernicium |
113 Nh  Nihonium |
114 Fl  Flerovium |
115 Mc  Moscovium |
116 Lv  Livermorium |
117 Ts  Tennessine |
118 Og  Oganesson |
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| 57 La  Lanthanum |
58 Ce  Cerium |
59 Pr  Praseodymium |
60 Nd  Neodymium |
61 Pm  Promethium |
62 Sm  Samarium |
63 Eu  Europium |
64 Gd  Gadolinium |
65 Tb  Terbium |
66 Dy  Dysprosium |
67 Ho  Holmium |
68 Er  Erbium |
69 Tm  Thulium |
70 Yb  Ytterbium |
71 Lu  Lutetium |
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| 89 Ac  Actinium |
90 Th  Thorium |
91 Pa  Protactinium |
92 U  Uranium |
93 Np  Neptunium |
94 Pu Plutonium |
95 Am  Americium |
96 Cm  Curium |
97 Bk  Berkelium |
98 Cf  Californium |
99 Es  Einsteinium |
100 Fm  Fermium |
101 Md  Mendelevium |
102 No  Nobelium |
103 Lr  Lawrencium |
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| – f block |
Plutonium Element Information
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| Origin of name | named after planet Pluto |
| Symbol | Pu |
| Atomic number (Z) | 94 |
| Atomic mass | (244) |
| Block | f-block |
| Period | 7 |
| Classification | Actinide |
| Atomic radius | 159 pm |
| Covalent radius | 187±1 pm |
| Melting point | 639.4 ℃, 1182.9 ℉, 912.5 K |
| Boiling point | 3228 ℃, 5842 ℉, 3505 K |
| Electron configuration | [Rn] 5f6 7s2 |
| Electrons per shell | 2, 8, 18, 32, 24, 8, 2 |
| Learn how to draw: Plutonium Bohr Model | |
| Crystal structure | Monoclinic |
| Phase at r.t | Solid |
| Density near r.t | 19.85 g/cm3 |
| Natural occurrence | From decay |
| Oxidation state | +4 |
| Electronegativity (Pauling scale) | 1.28 |
| Protons Neutrons Electrons |
94 150 94 |
| CAS number | 7440-07-5 |
| Discovered by | Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, and Edwin Mcmillan in 1940-1941 |
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Related:
More Elements:
External Links:
- https://www.rsc.org/periodic-table/element/94/plutonium
- https://en.wikipedia.org/wiki/Plutonium
- https://www.britannica.com/science/plutonium
- https://pubchem.ncbi.nlm.nih.gov/element/Plutonium
- https://www.chemicool.com/elements/plutonium.html
- https://www.space.com/what-is-plutonium
- https://www.ducksters.com/science/chemistry/plutonium.php
