The Element of the Week is Gallium! Atomic #31 on the periodic table. This amazing metal will melt in your hand and when combined with arsenic (gallium arsenide) makes a powerful solar cell. And it works great for the disappearing spoon trick. A great video from the Periodic Table of Videos.
Radium is hot stuff! It was used in self-luminating paints on alarm clocks and other devices into the 1950s, when it fell out of use due to the radioactive impacts on the paint process employees. Its chemical symbol is Ra and its atomic number 88. This means it has 88 electrons 88 protons. Check out […]
John Lennox, Oxford mathematician, recalls his dinner conversation with an atheist colleague. Everything can be reduced to physics and chemistry according to his neighbor’s system of belief. Lennox challenges the biochemist with semiotics, that is, information.