Monthly Archives: January 2017

Element 107 - Bohrium
Element Name: Bohrium (formerly Nielsbohrium) Atomic Number: 107 Symbol: Bh Atomic Weight: [264] Discovery: Dubna (Russia) 1975 or Heavy Ion Research Lab (Germany) 1976 Electron Configuration: [Rn] 7s2 5f14 6d5 Word Origin: Formerly Ns, Nielsbohrium. Named in honor of Niels Bohr. Sources: Bohrium is a man-made element. In 1976, Soviet […]

Bohrium Facts – Element 107 or Bh

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Dysprosium is a silver-colored rare earth element. This is a chunk of purified dysprosium metal. Tomihahndorf
Element Name: Dysprosium Atomic Number: 66 Symbol: Dy Atomic Weight: 162.50 Discovered By: Paul-Emile Lecoq de Boisbaudran Discovery Date: 1886 (France) Electronic Configuration: [Xe] 4f10 6s2 Atomic Weight: 162.50 Element Classification: Rare Earth (Lanthanide Series) Name Origin: Greek: dysprositos (hard to get at) Density (g/cc): 8.55 Melting Point (°K): 1685 […]

Dysprosium Facts – Element 66 or Dy

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Element Name: Mendelevium Atomic Number: 101 Symbol: Md Atomic Weight: 258.1 Discovery: G.T. Seaborg, S.G. Tompson, A. Ghiorso, K. Street Jr. (1955, United States) Electron Configuration: [Rn] 7s2 5f13 Word Origin: Named in honor of Dmitri Mendeleev, who devised a periodic table of the elements Isotopes: Fourteen isotopes have been […]

Mendelevium Facts – Element 101 or Md

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Einsteinium is a man-made radioactive metal. This quartz vial contains approximately 300 micrograms of solid Einsteinium-253. The blue light results from the intense radiation produced by einsteinium, primarily in the form of alpha decay. R.G. Haire, US Department of Energy
Element Name: Einsteinium Atomic Number: 99 Symbol: Es Atomic Weight: (254) Discovery: Ghiorso et al. 1952 Electron Configuration: 5f11 Group: Rare Earth, Actinides Melting Point: 1133.2 K 1st Ionization Energy: 619 kJ/mole Electronegativity: 1.3 Shells: 2,8,18,32,29,8,2 Characteristics: Radioactive Atomic Radius: 186 pm Source: Man-made References: Los Alamos National Laboratory (2001), […]

Einsteinium Facts – Element 99 or Es

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This is a chunk of pure praseodymium metal under a protective argon atmosphere. Praseodymium is a soft silvery metal that develops a green oxide coating that spalls off when exposed to air. Tomihahndorf
Element Name: Praseodymium Atomic Number: 59 Symbol: Pr Atomic Weight: 140.90765 Element Classification: Rare Earth Element (Lanthanide Series) Discoverer: C.F. Aver von Weisbach Discovery Date: 1885 (Austria) Name Origin: Greek: prasios and didymos (green twin); from its green salts Density (g/cc): 6.773 Melting Point: 1204 K Boiling Point: 3785 K […]

Praseodymium Facts – Element 59 or Pr

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This is the 2013 hybrid solar eclipse, viewed in Uganda on November 3, 2013. A hybrid solar eclipse includes an annular eclipse and a total solar eclipse. This rare event only occurs once about every 160 years. (Anne Helmenstine)
Have you ever heard of the element named coronium or newtonium? Coronium is the name given to an element that 19th century scientists believed might exist in the corona of the Sun. Researchers observed an unidentifiable green line in the spectra of the solar corona, which is visible during a […]

The Element Coronium and the Sun

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Astronauts report the Moon smells like burnt gunpowder. (NASA)
Have you ever wondered what the Moon smells like? Astronauts describe a characteristic scent to the Moon rock and dust. Can you guess what it was? Answer: Astronauts describe the Moon as smelling like burnt gunpowder. In fact, according to Apollo 16 pilot Charlie Duke, it even tasted like burnt […]

What Does the Moon Smell Like?

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