Tabla Periodica Pdf [new] Jun 2026

The vertical columns are called or Families. Elements in the same group typically have the same number of valence electrons (electrons in the outer shell). This gives them similar chemical behaviors.

Before the 19th century, chemistry was a science of anecdotes. Scientists had discovered dozens of elements—gold, silver, copper, sulfur—but there was no unifying theory connecting them. tabla periodica pdf

Roughly 75% of the table consists of metals. They are located on the left and in the center. The vertical columns are called or Families

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