__1803: __English chemist-physicist John Dalton starts using symbols to represent the atoms of different elements. Dalton, considered the father of modern atomic theory, made a logbook entry that day ...

The formula H₂O shows that water is made from two atoms of hydrogen (H) bonded to one atom of oxygen (O). Katie: Time for some science. And today it's a chemistry classic, the periodic table. And here ...

It happens all over the periodic table. The chemical symbol for lead is Pb. For mercury, Hg. For antimony, Sb. My chemistry teacher in high school cracked up every time she referred to the symbol for ...

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At one point, while drowning in research for The Disappearing Spoon, I could pretty much name every element on the periodic table, in order. I was more than happy to let this "talent" lapse, ...