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