- Little Diomede (en.wikivoyage.org)
Little Diomede is the smaller of the two Diomede Islands that lie in the middle of the Bering Strait. Little Diomede is the westernmost part of Alaska while Big Diomede, only a few km away, is the easternmost point in Russia.
- Chemical element (Wikipedia)
A chemical element is a chemical substance that cannot be broken down into other substances. The basic particle that constitutes a chemical element is the atom, and each chemical element is distinguished by the number of protons in the nuclei of its atoms, known as its atomic number. For example, oxygen has an atomic number of 8, meaning that each oxygen atom has 8 protons in its nucleus. This is in contrast to chemical compounds and mixtures, which contain atoms with more than one atomic number.