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.
1. Landslides and Landslide Susceptibility. Landslides are caused when the force of gravity pulls rock, debris or soil down a slope. They are one of the forms of erosion called mass wasting, which is broadly defined as erosion involving gravity as the agent causing movement.hen a potential hazard is present in the study area, the first step is to undertake a brief survey to establish whether landslides have occurred in recent times. Roads, railroads, and river banks are good sites for seeking signs of past landslide occurrence.