a level periodic table

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Periodic Table AQA A Level

The chemists have arranged the known elements on Earth, called the periodic table. The elements are organized in columns, known as groups – all elements in the same group will […]

Periodic Table A Level

Old Periodic Table A Level Dmitri Mendeleev (1834-1907) was a Russian chemist. In the 19th century, he was one of many scientists trying to organize all the elements known at […]