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The elements had been listed and carefully arranged before Dmitri Mendeleev. They had even been organized by similar properties before. So why is Mendeelev’s periodic table the one that has endu ...
Concept of recording the measurements
The following visual studies the work done by a pendulum: it is difficult to calculate as the force which acts on it varies constantly. If you select Table and start the animation you will be able to ...
Hipervinculo Química
"The periodic table is a chart which arranges all of the known elements according to their atomic numbers. The columns in the periodic table are called families or groups. The rows are called periods. ...
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