The Atomic Theory
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- At about 400 B.C. Democritus theorized that all material bodies are made up of indivisibly small “atoms. He theorized that Atoms are physically, but not geometrically, and that atoms are indestructible, and have always been and always will be in motion.
- Hello, I am Democritus, and proposed that all material bodies are made up of indivisibly small "atoms."
- In the year 1808, John Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.
- Atoms are tiny solid balls that are indivisible.
- John Dalton also found the Atomic Mass with other chemists and biochemists.
- In the year 1869, Dmitri Mendeleev created the periodic table. He created it with the Mendeleev Theory. Dmitri Mendeleev's Theory was arranging the 63 elements based on atomic mass into a periodic table.
- I created the periodic table and along with it i created 60 elements for it.
- In the year 1897, JJ Thomson found out that there are negatively charged particles inside the atom. Thomson named these negatively charged particles corpuscles, but scientists later changed them into what we know now as electrons.
- I made discovered the electron and then went on to propose a model for the structure of the atom.
- In the year 1910, Ernest Rutherford found that the atom is mostly empty space, with nearly all of its mass concentrated in a tiny central nucleus. The nucleus is positively charged and surrounded at a great distance by the negatively charged electrons.
- I discovered that the atom is mostly empty space, with nearly all of its mass concentrated in a tiny central nucleus. The nucleus is positively charged and surrounded at a great distance by the negatively charged electrons
- In 1932, James Chadwick discovered the Neutrons found inside the Nucleus.
- The Neutrons are found inside the Nucleus and are uncharged, thus giving them their name.
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