Anthony Lavoisier was the first person to make good use of the balance. He was an excellent experimenter. After a visit with Priestly in 1774, he began careful study of the burning process. He proposed the Combustion Theory which was based on sound mass measurements.This combustion allowed him to find out special elements.Lavoisier was wrong to know charcoal as an element.This is because as charcoal consists on average of only 85-98% carbon, an element is defined as a pure substance.Therefore this doesn’t make consider charcoal as an element.

Then in the year 1869 the periodic table was published by a man named Dmitriv Mendeleev.Also,this table started from the bottom with just one element starting at a time.The first person to realise that elements were similar to each other was a German chemist called Johann Dobereiner.He tried a lot of different elements and decided to group them.

John Newlands was an English chemist which found out how to organise and put the elements in their right places.He ended up organising them in eights.He arranged all the elements known at the time into a table in order of relative atomic mass. When he did this, he found that each element was similar to the element eight places further on. For example,he started at Li, Be is the second element, B is the third and Na is the eighth element.This is how he organised and placed them onto the periodic table.

The thing that was missing from Dmitriv Mendeleev’s periodic table was that he did not have the use of atomic number to order the elements.Using atomic number instead of atomic mass as the organising principle was first proposed by the British chemist Henry Moseley in 1913, and it solved anomalies like this one.These are how the periodic table in the present is organised. 1.)The chemical elements are arranged in order of increasing atomic number.2.)The rows are called periods and the columns are called groups.3.)Elements with similar chemical properties are in the same group of elements.