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13 mayo 1887 año - The english scientist Henry Moseley ( !887 - 1915 ) discovered that atoms of each element contain a unique positive charged

Descripción:

Henry Mendeleev

Añadido al timeline:

Jamiyah Polite & Anyliah Middleton

13 oct 2017

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fecha:

13 mayo 1887 año

Ahora mismo

~ 138 years ago

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