SPM ENG Chem – Development of the Periodic Table

Antoine Lavoisier was the first scientist to classify elements in a tabular form.

John Newlands named his law as the law of octaves.

Triads were a method of classifying elements by Johann Döbereiner.

Dmitri Mendeleev arranged elements in order of increasing atomic mass.

Henry Moseley discovered the relationship between X-ray spectra and the number of protons.

In the modern periodic table, elements are arranged in order of increasing proton number.

Elements with similar chemical properties are placed in the same vertical column.

John Newlands arranged elements into groups based on increasing atomic mass.

Alkali metals are placed at the peaks of the atomic mass graph by Lothar Meyer.

Dmitri Mendeleev predicted the existence of elements that had not yet been discovered based on known elements.

Antoine Lavoisier classified elements into metals and non-metals.

John Newlands found that the 8th element had properties similar to the 1st element.

Johann Döbereiner classified elements into groups of four based on similar chemical properties.

Henry Moseley arranged elements based on atomic mass.

Antoine Lavoisier used experiments to classify elements into similar groups.