Ulysses S. Grant is the answer
Slovakia became an independent nation in 1993 when it split with "<span>c. the Czech Republic". It should be noted that this shift occurred during a period of great ethnic turmoil in the region. </span>
His results gave the first evidence that atoms were made of smaller particles. Specially, he proved the existence of negatively charged sub-atomic particles known as electrons.
The awnser is D
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