Daily Archives: June 13, 2014


Helium Atom
Atomic mass is the mass of a single atom. This is found by adding up all the protons, neutrons and electrons in the atom. One proton has a mass of 1,836 electrons. Since electrons barely change the outcome of the atomic mass, they are generally left out of the calculation. […]

How to Calculate Atomic Mass Tutorial


Karl Landsteiner
June 14 is Karl Landsteiner’s birthday. Do you know your blood type? The letter designation used in blood types was developed by Karl Landsteiner. He was the first to separate types of blood by identifying the antigens on the surface of blood cells. He found four different classifications or types: […]

Today In Science History – June 14


Firework Color Elements 7
Fireworks colors are a matter of chemistry. The colors come partly from the elements and compounds used in fireworks and partly by incandescence or light produced by different temperatures. Here’s a look at how fireworks colors work: Firework Colors – Luminescence of Element and Compounds When chemicals are heated, the […]

Firework Colors Chemistry