Daily Archives: January 17, 2017


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


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


Grow borax crystals overnight to make a beautiful sparkling crystal heart. Use the borax crystal heart as a decoration or simply grow it as a fun crystal project. Borax Crystal Heart Materials borax water pipecleaner Make a Borax Crystal Heart Shape the pipecleaner like a heart. It’s fine to have […]

Borax Crystal Heart Science Project



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


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


Mercury is a heavy silvery metal that is liquid at room temperature. In the Mercury Beating Heart experiment, a drop of mercury pulsates rhythmically, like a beating heart. Femto/Elementbox04
The mercury beating heart is a popular chemistry demonstration based on an an electrochemical redox reaction that causes a blob of mercury to oscillate, resembling a beating heart. Here’s how the Mercury Beating Heart works and how you can perform this chemistry demonstration yourself. Mercury Beating Heart Overview A drop […]

Mercury Beating Heart Chemistry Demonstration