Plutonium Element in Periodic Table | Atomic Number Atomic Mass
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Plutonium Element:
Plutonium is a radioactive chemical element and it is a member of group 3 and period 7 in the periodic table. The atomic number of plutonium is 94 and it is indicated by symbol is Pu. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Plutonium was first produced and isolated by a deuteron bombardment of uranium-238 in the 60-inch cyclotron at the University of California, Berkeley on December 14, 1940. It has normally six allotropes at a high temperature with in a limited pressure range. Plutonium has been characterized by twenty radioactive isotopes. 244Pu, 242Pu and 239Pu are the longest lived isotopes of plutonium.
Uses Of Plutonium Element:
- Plutonium was used in the first atomic bombs and now also used in nuclear weapons.
- The pioneer and Voyager space probes used plutonium nuclear batteries as a power source.
- Tiny amount of plutonium is used in early pacemaker batteries.
Plutonium Element Information:
Discovery year: (1940–1)
Discovered by: Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan
Atomic number: 94
Relative atomic mass: [244]
Electron configuration: [Rn] 5f6 7s2
Block: f-block
Other elements in the same block:
Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Thorium, Protactinium, Uranium, Neptunium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and Lawrencium are the elements in the same block.
Period: period 7
Other elements in the same period:
Francium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicium, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson.
Group: Actinides
Other elements in the same group:
Thorium, Protactinium, Uranium, Neptunium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and Lawrencium are the elements in the same group.
Other elements in the same orbital:
Actinium, Thorium, Protactinium, Uranium, Neptunium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and Lawrencium are the elements in the same orbital.
Allotropes: none
Key isotopes: 238Pu, 239Pu, 240Pu
Melting point: 640°C, 1184°F, 913 K
Boiling point: 3228°C, 5842°F, 3501 K
Element category: actinide
Density (g cm−3): 19.7
CAS number: 7440-07-5
Color: silvery white
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