The Number of Elements Which Created the Earth, the Number of Discovered Elements by the Beginning of the 19th Century, English Chemist John Dalton Opening an Educational Institution During Adolescence, the Personality of Dalton, Dalton Understanding All Elements to Have the Same Ratio, Dalton Developing the Theory of Atoms (Ultimate Particles), the Ancient Greeks Developing the Concept of the Atom, Dalton Developing the Concept of “Atomic Weight”, the Reason Some Animals, Insects, and Arachnids Have Blue Blood, Swedish Chemist Jöns Jacob Berzelius Measuring the Atomic Weight of Every Known Element, the Number of Chemical Compounds Berzelius Weighed and Measured, the Number of Elements Berzelius Discovered the Atomic Weight of, Scientists Adopting the Concept of Atomic Weight and Searching for the Atomic Weight of Elements Using Various Methods, German Chemist Johann Wolfgang Döbereiner Believing the Chemical Properties and Reactions of Elements to be the Key to Understanding the Universe, the Reason Lithium Reacts With Water, How Reactive Elements Are Stored to Avoid Reactions With Water and the Ambient Environment (Oxygen), the Reason Lithium is Effervescent When Coming into Contact With Water, Lithium and Sodium Having the Same Reaction When Interacting With Water, the Reason Sodium Illuminates When Coming into Contact With Water, the Result of Potassium Coming into Contact With Water, Döbereiner Realizing the Correlation Between Lithium, Sodium, and Potassium, Russian Merchant Maria Mendeleev Experiencing a Devastating Factory Fire, Maria Migrating With Her Son Dimitri Mendeleev to St. Petersburg, Russia, the Death of Maria, Maria’s Last Words to Mendeleev, Mendeleev Attending a Symposium of Chemistry, Italian Chemist Stanislao Cannizzaro Developing a New Way to Accurately Calculate Atomic Weights, How Cannizzaro’s System Works, British Chemist John Newlands’ Concept of the “Law of Octaves”, the Etymology of the “Law of Octaves”, Newlands’ Idea Originally Rejected by Chemists, the Modern Day Name of the “Law of Octaves”, Mendeleev Believing Newlands to be Correct and Attempting to Expand Upon the Law of Octaves, Mendeleev Writing and Publishing Many Books Upon Disparate Subjects of Interest, the Past Time of Mendeleev’s Second Wife Russian Housewife Anna Ivanova Popova, Mendeleev Becoming Referred to as the “Russian Leonardo da Vinci”, Mendeleev Creating the Chemical Solitaire Game, the Reason Mendeleev Created Chemical Solitaire, the Prior Method of Categorizing Elements, Mendeleev Combining the Prior and New Way of Categorizing Elements, the Reason Mendeleev Should Have Failed Meeting His Goal, the Dream Which Helped Mendeleev Unlock the Periodic Table, Metal vs Non-Metal Ratio of the Periodic Table, Mendeleev Leaving Gaps Within the Periodic Table to Account for Future Discoveries, Mendeleev’s Periodic Table Being Accurate Enough to Predict Color and Melting Points of Elements, German Physicist Gustav Kirchhoff and German Chemist Robert Bunson Creating a New Method of Detecting Elements, the Cause of Bunson Losing His Left Eye, Bunson Studying the Unique Color Signature of Each Element, How Kirchhoff Invented the Spectroscope, Kirchhoff and Bunson Succesfully Discovering the Spectral Fingerprint of Each Element, Kirchhoff and Bunson Discovering 2 New Elements, French Chemist Paul-Émile Lecoq de Boisbaudran Leveraging the Spectroscope to Confirm Mendeleev’s Prediction of Gallium, Mendeleev Being Validated Near the End of His Life, the Periodic Table Within St. Petersburg, Russia in Honor of Mendeleev and the Mendelevium Element Named After Mendeleev, the First Person to Look Inside the Atom, Rutherford Comparing the Atom to a Miniaturized Solar System, Danish Physicist Niels Bohr Hypothesizing That Electrons Only Orbit Within Set Values, How Electron Orbital Shells are Organized, Bohr Successfully Demonstrating Why Elements React, Bohr’s Theory Confirming Mendeleev’s Shape Design of the Periodic Table to be Correct, the Heaviest Known Element, the Method Developed by British Physicist Henry Moseley to Study the Nucleus of the Atom, the Advent of the Atomic Number, Atomic Weight vs Atomic Number, the Reason Mosley Proclaimed No Elements Outside of Uranium Can Exist, the Death of Mosley, the Most Costly Death of World War I, and the Reason Mosley Chose to Participate Within World War I

The Earth was created with 92 elements. At the beginning of the 19th century, only 55 elements were known to exist. John Dalton, a British intellectual born in 1776, was so bright as a child that by 12 he had started a school and was teaching other local children. Dalton was quiet, retiring man, who was a lifelong bachelor. Dalton was an avid reader and understood that every element has the same ratio regardless of where it’s found (eg. sodium chloride more commonly referred to as salt is the sa...

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