- The Alpine Lakes Wilderness covers more than 414,000 acres within the Mount Baker-Snoqualmie and Okanogan-Wenatchee national forests in the northern Cascade Range of Washington. The wilderness includes parts of Chelan, Kittitas, and King counties. It is bordered by Snoqualmie Pass to the south, by the town of Leavenworth to the east, and by Stevens Pass to the north. The Alpine Lakes Wilderness got its name from its more than 600 ponds and lakes, which offer scenic grandeur and abundant water. The wilderness was created in 1976 by President Gerald Ford and expanded in 2014 by President Barack Obama. Most challenging for its future sustainability, it lies only an hour or two from the heart of Seattle.
- Covalent bond (Wikipedia)
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs. The stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. For many molecules, the sharing of electrons allows each atom to attain the equivalent of a full valence shell, corresponding to a stable electronic configuration. In organic chemistry, covalent bonding is much more common than ionic bonding, where atoms are separate and merely associated by electrostatic attraction.