Katie: Time for some science ... made from only one type of atom. And there are quite a lot of elements. There are something like 100, and each has a unique symbol made up of a letter and ...

Each ammonia molecule contains one atom of nitrogen and three atoms of hydrogen. We know this because the hydrogen symbol has a subscript three after it, whereas the nitrogen symbol has no number ...

When building an atom, pay close attention to the particles' electrical charges. Protons have a charge of +1. Electrons have a charge of -1. Neutrons are neutral, as its name implies. A stable ...

His book, Rex, the Life Atom* has been selected, it is said, by the Swedish Royal Academy of Science as “the best book of the year in the scientific world”—a rather extravagant tribute.

That pun is based on the fact that the main building blocks in the branch of science are chemical elements, pure substances ...