Halocheno

Os halochenos son os elementos d'o grupo 17 d'a tabla periodica.
Istos son elementos volatils, que tienden a pillar un electrón ta rematar d'emplir a suya capa de valencia, formando un anión (haluro). Tamién tienden a reaccionar con metals alcalins u alcalinoterrio ta formar sals ionicas. Si s'augmenta o numero atomico (Z) s'intensifica la color.
En a naturaleza, se troban en forma de moleculas diatomicas y en diferents estatu: gas (F2, Cl2), liquido (Br2) u solido (I2).
Tipos
- Flúor (F): ye un gas de color amarillenca palida, licherament mas pesau que l'aire, corrosivo y d'olor penetrant y irritant.
- Cloro (Cl): ye un gas amarillenco-verdoso d'olor penetrant y irritant.
- Bromo (Br): a temperatura ambient ye un liquido de color roya fosca, tres vegadas mas denso que l'augua, que se volatiliza con facilidat producindo una vapor verenosa.
- Yodo (I): ye un solido cristalino a temperatura ambient, color negra brillant, que sublima dando una vapor violeta muit intensa, verenosa y d'olor picant.
- Astato (At): ye un elemento muit inestable que nomás existe que en as formas radioactivas de vida curta.
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