• 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...


´╗┐History of the Periodic Table During the 1860?s, we knew that about sixty elements existed but the organisation of these elements was yet to occur. A method was needed, so many different scientists significantly contributed, and helped out, so that eventually Dmitri Mendeleev managed to finally construct his table: The Periodic Table. This table is completely based on the properties of matter; the properties of these elements can be described, separated and identified. The arrangement of electrons in atoms has helped to show and explain to us the patterns of behaviour of the elements! There are two types of property of matter: physical properties which describe the material as it is, and chemical properties which show us how an element reacts. The idea to create the periodic table came from the idea that we can easily arrange all the elements in a format which would easily show similarity among groups. ...read more.


About fifty years later, John Newlands, an English chemist, discovered a new method for organising the elements and by this time lots of new elements had been discovered and had been measured much more accurately. He took Dobereiner?s simple ideas involving similar properties and improved them, by relating all the elements to each other to find a certain pattern. He found out that after intervals of eight, similar physical or chemical properties reappeared again in the element, so he decided to write a paper regarding this explaining his ?Law of Octaves?. Dmitri Mendeleev is a Russian Chemist who devised the periodic table we know to this very day. He took some of Newlands? ideas and improved on them, to devise his own table, which was quite similar to Newlands?. ...read more.


The most recent version of the periodic table is based upon Moseley?s Periodic Law, regarding atomic numbers. Another major change that occurred was when Glenn Seaborg discovered some of the lanthanide and actinide elements, numbers from 94 to 102, and decided to modify the periodic table by placing these elements at the bottom of the table. The periodic table is made up of vertical groups and horizontal periods. In the vertical groups, elements have the same number of the electrons in their outer shell, and in horizontal periods, elements have the same principal quantum. Many scientists have put in a lot of work to form the periodic table that we use to this very day. As technology progresses and our understanding gets better, this periodic table could even develop further in years to come! ...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

Here's what a teacher thought of this essay

4 star(s)

Mark: 4/5

This is a very detailed essay. It describes in depth many of the significant discoveries in relation the the periodic table and gives some further explanation on the elements themselves.

I feel that the author has never really distinguished between arranging the periodic table by electron number as opposed to atomic mass. Also, a clearer introduction is necessary to provide structure to the essay.

Marked by teacher Kathryn Bradley 05/10/2012

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

    Identifying an Ionic Compound. Objectives: To learn and test for metal ions ...

    5 star(s)

    Is the result positive or negative? In another test tube, add 2cm3 ´┐Ż0.05 0.1 mol/ of HCL to test for CO32-.

  2. Peer reviewed

    Rate of reaction between Calcium Carbonate and Hydrochloric Acid

    4 star(s)

    the line of best fit, which is almost straight and illustrates that the relationship between the concentration and the rate of reaction is proportional. Evaluation The results obtained were reliable and helped me prove my hypothesis correct but with a few anomalies which could be due to minor inaccuracy errors.

  1. The rates of reaction between CaCO3 and HCL

    Using these averages I can draw a graph to calculate the rate of the reaction. The rate of reaction is affected by four different variables: * Temperature, the reaction between CaCO3 +HCL is an exothermic reaction (it produces heat). Even though this will affect the temperature the amount of heat

  2. Comparing the Chemical Properties of Alkanes and Alkenes

    B. Bromine: In the presence of light the bromine has reacted with the cyclohexane. The Bromine has lost the yellow-brown pigment it had and the solution now formed is almost completely colourless.

  1. Describe and explain the type of bonding in ethane, ethene, and benzene. Compare their ...

    The sunlight is required to provide the UV photon which gives the bromine molecule the energy so that it undergoes homolytic fission. The reaction produces bromine radicals and the reaction propagates for several thousand cycles before it undergoes the termination phase.

  2. An investigation into the water of crystallisation present in Hydrated Magnesium Sulphate

    The reason this can be stated is that heating the Hydrated Magnesium sulphate until the mass no longer lowered ensured all the water had been evaporated. By using the reference table, which calculates Relative Molecular Mass' and accurately calculates the percentage of those molecules that is water.

  1. Investigating the energy change when zinc reacts with copper(II) sulphate.

    I will work out the energy change using the formula volume of solution x 4.18 x temp. rise. Vol. (ml) Energy change (j) 25.00 52.25 25.00 240.35 25.00 365.75 25.00 731.5 25.00 836.00 I will now calculate the energy change/mole by: energy change Mass of zinc.

  2. Determining the water of crystalisation

    I put the crucible with lit and salt onto Bunsen burner and heated it strongly for 4 minutes. At the end I put off the lit to let the water moisture to evaporate. Since the mass of crucible can differ in different temperatures I had to leave it to cool

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