Respuesta :

 is a way to organize the elements based on their similarities. The first version was constructed by Dmitri Mendeleev in 1869. He put the elements into a grid with increasing atomic weights and noticed the elements in each column had similar chemical properties.
KatieKitten
The periodic table is shaped that way because it is used to organize l the elements by their atomic number, amount of neurons, gas, solid, and liquid. The poor of the periodic table is to basically organize all the elements by their similarities in each other.

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