Our current model of the atom can be broken down into three constituents parts â protons, neutron, and electrons. Each of these parts has an associated charge, with protons carrying a positive charge, electrons having a negative charge, and neutrons possessing no net charge. In accordance with the Standard Model of particle physics, protons and neutrons make up the nucleus of the atom, while electrons orbit it in a âcloudâ.
Michigan has the longest freshwater coastline in the US and the second longest coast line in the US next to Alaska. There is a comparative table of state shorelines on the Michigan Dept. of Environmental Quality's site that gives the measurements for states touching the Great Lakes.
Long Beach, Washington At 28 miles long, this claims to be America's longest contiguous beach. Muizenberg, South Africa The town of Muizenberg, a suburb of Cape Town, marks the start of a roughly 25-mile beach that curves around to nearby False Bay. Beware, there have been shark sightings in the past. Stockton Beach, Australia Not only is this beach long (nearly 20 miles long), but it's popular with dune surfers, 4-wheel drive enthusiasts and surfers. Marina Beach, Chennai, India At around 8 miles long, it's the longest urban beach in India.