History of the atom

Timeline created by gulinm
  • 384

    Aristole

    Aristole born in 384BC in Greece, he was a Greek philosopher who believed that all matter is one of the four elements, which are air, water, earth and fire. The theory that Aristole had about the four elements earth, water, air and fire have not influenced the people of today’s opinions as we know the different elements and the four that Aristole discovered aren’t known as elements.
  • 460

    Democritus Part 1.

    Born in 460 BC in ancient greek. Democritus was a philosopher who developed the first atomic theory. His theory was that everything is made up of atoms although they’re physically invisible they can be seen up close with a very strong magnify. In between the atoms he discovered that it was just completely empty space.
  • 460

    Democrius Part 2.

    Democritus’ theory about atoms has half influenced the people of today’s opinions as we know that atoms can not be physically seen unless a very strong microscope to see the atom but his theory that atoms were completely empty space which was proven wrong in later years.
  • Jan 1, 600

    Thales

    Thales born in Greece around 600BC. Was led to believe by his observations of water and how it was a vital source that was needed. And after long observations Thales proposed that water was the basis of all material.Many people believed in Thales theory up until the 1700 where it was proven water is not the basis of all material so as people today Thales theory has had no influence on our opinions.
  • Antoine Lavoisier Part 1.

    Born in 1743 Antoine Lavoisier in Paris. He was a modern chemist; he was the one who discovered that water is made up of hydrogen and oxygen. Lavoisier also came up with a way that showed how chemical elements were not created or destroyed that in fact they were just combined into the different chemical compounds. Lavoisier also discovered things about carbon dioxide including the fact that humans exhale it.
  • Antoine Lavoisier Part 2.

    Lavoisier’s work that he has done has influenced the people of today’s opinions as we have learnt about both water and carbon dioxide from his theories.
  • John Dalton

    John Dalton born in 1776 in Cockermouth. John Dalton was the one who proposed the Law of Multiple Proportions, which later led to Dalton’s atomic Theory. Dalton came up with the theory of ratios that is used when you add two different atoms to create a different element. He also developed an atomic weight scale by using the percentage composition and the assumed atomic ratios.Dalton’s theory influences the people of today’s opinions as we use his theory of ratios.
  • Dmitri Mendeleev

    Dmitri Mendeleev was born in 1834 in Siberia. Mendeleev is known for the work he contributed to the Periodic Table where he arranged 63 known elements into the design of the Periodic Table, which was based on the atomic mass, which was published in 1869 in Principles of Chemistry. Dmitri’s work has greatly influenced the people of today’s opinions as his creation of the periodic table has being adopted, updated and is being used and referred to every day.
  • Joseph John Thomson

    J.J. Thomson was born in Cheetham Hill, England in 1856. Thomson had come up with a plum pudding model which showed his discovery of how the total charge of the “plum pudding” which was positive and that the electrons were ruled out by the total charge of the atom. J.J. Thomsan’s theory hasn’t influenced the people of today’s opinions as his theory has being proven to be incorrect.
  • Max Planck

    Born in Germany 1858 Max Planck a German physicist. He discovered that the pattern of light worked as a frequency he said that the intensity of light that was emitted from a black body at any given frequency. Which he explained to show that energy is carried in tiny, discontinuous units and not a continuous, flow of energy.
    Max Planck’s theory about the pattern of light has influence people’s opinions today as they’ve learnt about the way the pattern of light works.
  • Nagasaki Hantaro

    Born in 1865 in Nagasaki Hantaro developed his theory of the layout of the atom which was that the atom was quite large and that it was a positively charged sphere shaped atom where light weight negatively charged electrons would circle around. Hantaro’s theory has not influenced the people of today’s opinions as people have later discovered that the atom is a very small particle and can be only seen with special equipment.
  • Ernest Rutheford

    Born in 1871 on the 30th of August in New Zealand Ernest Rutherford who is now renowned by many people mainly scientist today for his discovery of how the atom’s mass is the Nucleus. Rutherford’s discovery is recognised by many scientists today his theory about the Nucleus being the atoms mass has being helpful and have influenced their opinions today.
  • Albert Einstein Part 1.

    Born in Germany in 1879 Albert Einstein is a well-known scientist. Einstein created a formula which has become the cornerstone of atomic theory. The formula is E=mc2, which means that Energy equals mass times the velocity of light squared. Einstein discovered a term known as photoelectric, which takes place when the presence of electrons which are produced when a beam of light is directed onto the surface of metal. Einstein’s theory of how light only travelled in waves, challenged the idea.
  • Albert Einstein Part 2.

    Albert Einstein’s theory has widely influenced the people of todays opinions as they are using his formula every single to solve equations.
  • Niels Bohr Part 1.

    Born in 1885 in Copenhagen Nels Bohr was a Danish Physicist. He came up the theory of how the atom is very small and inside it, it contains the positively charged nucleus containing protons and neutrons and that they are then surrounded by negatively charged electrons.
  • Niels Bohr Part 3.

    Bohr’s theory has influenced the people of today’s opinions as his theory of how the nucleus contain protons and neutrons, which are positively charged and are surrounded by negatively charged neutrons his theory has helped scientists to further develop the knowledge about the atom.
  • Niels Bohr Part 2.

    He believed that the electrons would orbit in a circular motion around the nucleus this does sound a bit like the way the solar system but the difference is that rather than the force of gravity it’s actually electro static force that is providing attraction force.
  • James Chadwick

    James Chadwick was born in Cheshire, England in 1891. James was able to prove the existence of neutrons he also discovered how the atomic number is determined which is determined by the number of protons in an atom. Chadwick’s theory has influenced the people of today’s opinions greatly as he was the person who figured out how the atomic number is determined which people are referring to every day.
  • Louis de Broglie

    Born in 1892 in France Louis de Broglie. He believed that electrons act as both particles and waves as they orbit around the nucleus which produces a wave of a certain energy, wavelength and frequency.Louis theory has impacted the people of today’s opinion’s as his theory has contributed to quantum physics which is applied today in computers, microscopes and lasers.
  • Erwin Schrodinger

    Born in 1926 in Austria Erwin Schrodinger. Was the person who figured out how to determine the probability of when an electron is an atom.
    Schrodinger’s theory about how to determine the probability of when a electron is a atom has influenced the people of todays opinions as it works out the possibility of a electron being a atom.
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    History of the Atom