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Chemistry (Salters) Skills for Chemistry: Open-Book Paper - The Periodic Table.
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Chemistry (Salters) Skills for Chemistry: Open-Book Paper The Periodic Table is a matrix in which known elements are arranged in order of increasing atomic number. Elements with similar properties are placed under one another in columns, of which there are 8 groups. Each group shows an order of chemical and physical properties, from group 1, to group 8. Antoine Lavoisier was the first scientist to define a chemical element, immediately upon doing so applied 33 of those known into a table for the publication of his book in 1789. Within his table, the 'elements' were grouped into four categories in relation to their chemical properties. These were: gases, metals, non-metals and earths. As technology began to develop over the years, more reliable theories were devised in order to characterise and present elements. By the early 19th century German scientist Johann Dobereiner produced his law of Triads. This was key to the development of...
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