The Disappearing Spoon by Sam Kean
One of the prettiest books I have on my shelves right now is Theodore Gray's The Elements, a visual collection of all the elements that make up the physical universe. "Everything you can drop on your foot," as he says. In it, he provides wonderful pictures and descriptions of the elements that we know, arranged as they would be in the periodic table. It's a gorgeous book, one that everyone should have - especially if you have children. If you want your kids to become interested in science and investigating the world around them, you could do far worse than to have this book on your shelves.
Eventually, though, they'll be old enough and canny enough to ask, "Well, how do we know all this? Where did we find these things, and how? And why are they in this order?" That's the point where you hand them The Disappearing Spoon, sit back, and let Sam Kean take over.
The story of the elements, and our understanding of them, is governed just as much by personality as by p-shells, as much by competition as by charge, as much by ego as by electrons. While the elements themselves don't pay any attention to human affairs, the quest to understand the building blocks of matter have sent us to the hearts of stars, the depths of the earth and, for various reasons, Ytterby, Sweden. 
Kean starts with how he got into the elements, with a story that would horrify modern-day parents: mercury. When he was a kid, his mother would collect the mercury from broken thermometers and keep it in a little bottle on a high shelf. If they were lucky, she would let her children play with it for a while, swirling it around and watching while this shiny liquid metal split apart and fused back together perfectly, never leaving a bit of itself behind. It was a metal that flowed like water, and it was fascinating. If he had known at that age that ancient alchemists thought there were spirits living in mercury, he would not have been surprised.
Keeping an eye out for mercury, he learned that modern scientists are able to follow the expedition of Lewis and Clark using mercury. The explorers carried with them a good quantity of Dr. Benjamin Rush's Bilious Pills, a "cure" for any illness that mainly contained mercury chloride. It was vile stuff, poisoning everyone who took it, but without an FDA around to stop this kind of nonsense, Rush made plenty of money. It probably didn't hurt his credibility that he was one of the signers of the Declaration of Independence. In any case, he gave samples to the Lewis and Clark expedition, and their latrine sites can still be found today by the unusually high levels of mercury that were deposited there as the men's bodies tried to get rid of the heavy metal as quickly as possible.
Mercury also taught Kean about mythology - the Roman god of communication, modeled on the Greek message-bearer. It taught him etymology - the chemical symbol for mercury is Hg, which is derived from the Latin hydragyrum, which means "silver water." It informed him on literature, especially the Mad Hatter of Alice in Wonderland, who was based on the poor crazies who used to breathe in the fumes of mercury while setting felt for their hats.
This one weird, eerie element was a door into so many other topics that he figured there must be others. And so he started work on this book, a collection of histories and tales, gossip and hearsay, all centered around the 118 physical elements that make up our universe. "As we know," he writes, "90 percent of particles in the universe are hydrogen, and the other 10 percent are helium. Everything else, including six million billion billion kilos of earth, is a cosmic rounding error." Within that rounding error, though, some amazing things have been found.
In the 19th century, the Russian Dimitri Mendeleev examined the common properties of different elements and was able to sort the elements in such a way that took advantage of their similarities. The violent alkalies along the far left, which will explode if given half a chance, and their cousins, the halogens on the far right, some of the most reactive elements in nature. Separating them are the noble gasses, which don't react with anything unless pushed to extremes. Without knowing about electron shells and the weird quantum things that happen on the atomic level, Mendeleev managed to put together a table so good that he was able to leave gaps in it that corresponded to elements that hadn't yet been found. And by telling the world that these gaps existed, the race to isolate and discover the elements was on.
Kean's book is a great look at the way science works on a human level. How the search for high-quality porcelain led to the discovery of an entire class of elements, how Marie Curie would get into trouble by dragging her (male) colleagues into dark closets to show them how radium glowed, how nitrogen kills with kindness and lithium quiets an unsettled mind. The competition to not only find these elements but to name them and find uses for them has driven science forward in all fields, from geology to neurology, for the last two hundred years. Those 118 squares on the periodic table have driven men to travel the world, to create economic and political empires, to love, to hate, and to murder.
If this kind of thing were taught in high school chemistry class, there would probably be a lot more kids interested in science as a career.
The book is very readable, even if it does drift from time to time into more technical areas. One of my colleagues, who doesn't have an extensive background in science, said she was a little slowed down by talk of electron shells and quantum jumps, which I guess were not aided by Kean's elevator similes. But it did get her asking the right questions - how do we know atoms exist if we can't see them? How can we be sure that what is in this book is true?
Those are the questions that Kean tries to answer in the book, but it's also the kind of book that may bring up more questions. It's "gateway science," one of those books that pulls away the cold, rational veneer of the scientist and his or her endeavors, and shows what an exciting, weird, messy and dramatic place science can be. What's more, it shows how science is deeply ingrained not only into our technology, but our language, history and politics. An understanding of science, even at an amateur level, is a wonderful way to open your eyes to the great, complex and bizarre world in which we live.
"We eat and breathe the periodic table; people bet and lose huge sums on it; philosophers use it to probe the meaning of science; it poisons people; it spawns wars. Between hydrogen at the top left and the man-made impossibilities lurking along the bottom, you can find bubbles, bombs, money, alchemy, petty politics, history, poison, crime, and love. Even some science."
- Sam Kean, The Disappearing Spoon
 The town has the distinct honor of having four elements named after it: yttrium (Y), ytterbium (Yb), terbium (Tb), and erbium (Er). What has your hometown got?