40 HELP PLEASE Find a Wikipedia article related to a scientific concept or theory that interests you. Here are a few ideas, if you don’t already have a topic in mind: Hubble’s law of cosmic expansion, Kepler’s three laws of planetary motion, Newton’s universal law of gravitation, Newton’s laws of motion, the laws of thermodynamics, Archimedes's buoyancy principle, quantum theory, or the oxygen theory of combustion.

After reading the Wikipedia article, summarize the history of the concept or theory in one or two paragraph/s. Be sure to use transition tags that indicate when each event occurred, in relation to other events.

The history of quantum mechanics began in the 17th and 18th centuries, when scientists such as Robert Hooke, Christiaan Huygens and Leonhard Euler proposed a wave theory of light based on experimental observations.  Much later in the first half of the 20th century, the foundations of quantum mechanics were established by people like Max Planck and Albert Einstein to name a few well known names.  In the mid-1920s quantum mechanics was developed to become the standard formulation for atomic physics.  In the summer of 1925, Bohr and Heisenberg published results that closed the old quantum theory. Due to their particle-like behavior in certain processes and measurements, light quanta came to be called photons.  

    Later on, in 1930 quantum mechanics had been further unified and formalized by David Hilbert, Paul Dirac and John von Neumann with greater emphasis on measurement, the statistical nature of our knowledge of reality, and philosophical speculation about the 'observer'.  It has since permeated many disciplines, including quantum chemistry, quantum electronics, quantum optics, and quantum information science. It also provides a useful framework for many features of the modern periodic table of elements, and describes the behaviors of atoms during chemical bonding and the flow of electrons in computer semiconductors, and therefore plays a crucial role in many modern technologies.  Its speculative modern developments include string theory and quantum gravity theory.

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