Mendelleev’s Periodic Table | Chemistry: A Volatile History
An account of how Mendeleev arranged the elements by atomic mass to create his periodic table, and how he identified patterns in the chemical properties of the elements within his arrangement.
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Jim Al-Khalili explores how Ernest Rutherford's work on the atom revealed what electricity was on the atomic scale.
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An electric current is essentially the flow of electrons (which are electrically charged) from one atom to another.