The atomic number is the count of protons in an atom's nucleus, a unique identifier for each element.
El número atómico es la cantidad de protones en el núcleo de un átomo, un identificador único para cada elemento.
| Front | atomic number |
|---|---|
| Back | The number of protons in the nucleus of an atom, unique for each element and designated by a subscript to the left of the elemental symbol. |
Tags: ch.02
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