An isotope is one of two or more species of atoms of a chemical element with the same atomic number (same number or protons in the nucleus) and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties. Every chemical element has one or more isotopes.
A landslide is the movement of rock, debris or earth down a slope. They result from the failure of the materials which make up the hill slope and are driven by the force of gravity. Landslides are known also as landslips, slumps or slope failure.
Landslide: a special risk that requires special coverage. SEATTLE-Heavy rains can loosen soil and weaken hillsides, posing significant landslide risks to homeowners and business owners. Standard homeowners and business insurance specifically excludes damage caused by earth movement such as landslide and earthquake.