Mendelevium (pronounced /ˌmɛndəˈlɛviəm/ or /ˌmɛndəˈliːviəm/) is a synthetic element with the symbol Md (formerly Mv) and the atomic number 101. A metallic radioactive transuranic element of the actinides, mendelevium is synthesized by bombarding einsteinium with alpha particles and was named after Dmitri Mendeleev, who was responsible for the Periodic Table.
Researchers have shown that mendelevium has a moderately stable dipositive (II) oxidation...
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Mendelevium
Chemical Element
The 101st Element in the Periodic Table
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Fermium
Fermium (pronounced /ˈfɜrmiəm/, FER-mee-em) is a synthetic element with the symbol Fm and atomic number 100. A highly radioactive metallic...
Symbol:
- Md
Atomic mass:
- 258 u (4.28E-16 µg )
Electronegativity (Pauling scale):
- 1.3
Van der Waals radius:
- 200 pm (0.00000787 )
Isotopes:
- Mendelevium-250
- Mendelevium-247
- Mendelevium-261
- Mendelevium-256
- Mendelevium-260
- Mendelevium-246
- Mendelevium-262
- Mendelevium-258
- Mendelevium-245
- Mendelevium-257
Melting Point:
- 826.85 °C (1520.3 °F )
Periodic table block:
Ionization Energy:
- 6.58 eV (0.00000658 MeV )
Discovery Date:
- 1955
Electron Configuration:
- Rn 5f13 7s2
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Thorium
Thorium (pronounced /ˈθɔəriəm/, THOHR-ee-əm) is a chemical element with the symbol Th and atomic number 90. It is a naturally occurring, slightly radioactive metal. Thorium is estimated to be about three to four times more abundant than uranium in the earth's crust. Thorium was successfully used as... -
Curium
Curium (pronounced /ˈkjʊəriəm/ KEWR-ee-əm) is a synthetic chemical element with the symbol Cm and atomic number 96. A radioactive metallic transuranic element of the actinide series, curium is produced by bombarding plutonium with alpha particles (helium ions) and was named for Marie Curie and her... -
Nobelium
Nobelium (pronounced /noʊˈbɛliəm/ noh-BEL-ee-əm or /noʊˈbiːliəm/ noh-BEE-lee-əm) is a synthetic element with the symbol No and atomic number 102. It was first correctly identified in 1956 by scientists at the Flerov Laboratory of Nuclear Reactions in Dubna, Russia. Little is known about the element... -
Neptunium
Neptunium (pronounced /nɛpˈtjuːniəm/, nep-TEW-nee-əm) is a chemical element with the symbol Np and atomic number 93. A radioactive metallic element, neptunium is the first transuranic element and belongs to the actinide series. Its most stable isotope, Np, is a by-product of nuclear reactors and... -
Americium
Americium (pronounced /ˌæməˈrɪsiəm/, AM-ə-RIS-ee-əm) is a synthetic element that has the symbol Am and atomic number 95. A radioactive metallic element, americium is an actinide that was obtained in 1944 by Glenn T. Seaborg who was bombarding plutonium with neutrons and was the fourth transuranic... -
Plutonium
Plutonium (pronounced /pluːˈtoʊniəm/ ploo-TOH-nee-əm, symbol Pu, atomic number 94) is a rare transuranic radioactive element. It is an actinide metal of silvery-white appearance that tarnishes when exposed to air, forming a dull coating when oxidized. The element normally exhibits six allotropes...