¿Qué es un átomo?

lego-atomos

Si queremos saber qué es un átomo, vamos a centrarnos en todas las cosas que nos rodean y que conocemos: nosotros los humanos, las plantas, la tierra, el aire que respiramos, y también, los meteoritos, la luna… y a todo esto le vamos a llamar materia.

Pues bien, resulta que toda la materia está construida a partir de unas 100  familias de piezas básicas llamadas elementos, sí, los famosos elementos de la tabla periódica.

Es como si todo lo que está hecho de materia fueran construcciones de lego, donde las piezas de la misma familia son piezas iguales (1) del mismo elemento, y cada pieza es un átomo. Y lo curioso es que sólo necesitamos alrededor de 100 familias de átomos para construir toda la materia de la que estamos hechos.

Pero miremos dentro del átomo, dentro de cada una de esas piezas del lego de la materia ¿qué vemos? Sí, dentro hay cosas todavía más pequeñas, veámoslas. Dentro hay partículas. Pero esta es otra historia que contaremos otro día.

(1) algunas son un poco diferentes, pero sólo un poco, y se conocen como isótopos.

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