• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The history of the periodic table.

Extracts from this document...


The history of the periodic table and its elements can be traced as far back as the Ancient Greek times. They believed in four simple elements. These were: earth, air, water, and fire. This idea of elements was never picked up again until the 17th and 18th centuries. Also, another Greek idea was that the universe was made out of small particles called atoms. Leucippus and Demokritos had the idea of that and worked together. However, Aristotle (a Greek philosopher) didn't agree, and the idea never carried on. About 200 years ago, a man named John Dalton suggested the exact same thing. He did continuous research, like the combination of a hydrogen atom with an oxygen atom to form water. ...read more.


They had no idea about atomic structure or protons and electrons. This meant there was no 'proton number' to them. The discovered elements so far were arranged in order of atomic mass only, and so obviously things were bound to be wrong. Johnann Doebereiner used this method, and arranged the elements also by their properties. He discovered that barium, calcium and strontium had similar properties, and arranged them in a group of three - a triad. This continued, as more triads were being put together. In 1863 - 1864, John Newlands arranged the elements, again in order of atomic masses. The only difference was that Newlands wanted to expand upon Doebereiner's idea, and relate each element to each other. ...read more.


When new elements were found, they fitted in nicely. However, after this adjustment, he still had two elements that did not fit. Those elements were tellurium and iodine. Mendeleev assumed that the masses had been measured incorrectly and he placed them according to property. The table had a few other inconsistencies that were discovered as this table was used. Nevertheless, Mendeleev is known as the Father of the Modern Periodic Table. In 1913 Henry Moseley conducted X-ray experiments on elements. The outcome of his experiments led to the discovery of the atomic number. He announced that if Mendeleev had arranged his table by atomic number instead of atomic mass, then the little inconsistencies would not have occurred. He led this on to the blueprint of the modern periodic table. Unfortunately, he did not continue his work as he died whilst being out at war. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Classifying Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Classifying Materials essays

  1. Marked by a teacher

    Chemistry Revision Notes on atomic structure, nuclear power and the periodic table

    4 star(s)

    Ions > The addition or removal of electrons from atoms or groups of atoms creates ions. > An atom that has lost one or more of its electrons is positively charged and is called a cation. > An atom that has gained one or more electrons is called an anion and is negatively charged.

  2. Marked by a teacher

    The History of the Periodic Table

    4 star(s)

    He decided it would be a good idea to leave gaps in his table so that in the future, elements that are yet to be discovered could be placed neatly into those gaps. Over the last 140 year, all of these elements have been discovered!

  1. Peer reviewed

    Revision notes on elements, the periodic table and compounds.

    4 star(s)

    - exposure to light - passing electric current through them 4. The different elements in a compound are joined together in a fixed proportion by mass. Formation of compounds: 1. Elements + Elements 2. Elements + Compounds 3. Compounds + Compounds 4.

  2. Free essay

    Periodic table

    First shell holds only 2 electrons (K) 2. Second shell holds up to 8 electrons (L) 3. Third shell holds up to 18 electrons (M) 4. Fourth shell holds up to 32 electrons (N) - The Outside shell can only ever hold 8 electrons - The following equation is

  1. A practical study of the periodic table.

    H2O CaO + 2NaOH � Ca(OH)2 + Na2O Al2O3 Al2O3 + H2O � 2Al(OH)3 Al2O3 + 6HCl � 2AlCl3 + 3H2O Al2O3 + 6NaOH � 2Al(OH)3 + 3Na2O SiO2 SiO2 + H2O � H2SiO3 SiO2 + 4HCl � 2H2O + SiCl4 SiO2 + 2NaOH � H2SiO3 + Na2O ii.

  2. The role of mass customization and postponement in global logistics

    Products at the end of life cycle lose value quickly and risk obsolescence, which can lead to large inventory write-offs. Moreover, with customer demand increasing for product specification, companies must produce several versions of each model. Many manufacturers and retailers today are turning to postponement or delayed differentiation strategy to strike the right balance.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work