When naming an ionic compound what must always
come first the anion or the cation? (Metal or
nonmetal)
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Ответ:
Cation / metal
Explanation:
When we named ionic compound we always write cation first. Let's take an example.
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion. Both atoms are bonded together electrostatic attraction occur between anion and cations and ionic compound is formed. When we naming it we write " sodium " first which indicate sodium cation ( Na⁺) while anion which is Cl⁻ is always written at the end. When we naming ionic compound we ended the name of anion with "ide". Sodium indicate metal while chloride ion indicate non metal. it means metal comes first while naming ionic compound.
Ответ:
Seria el compuesto : SO₂
Explanation:
El oxigeno molecular es aquel que tiene como valencia el numero -2, en el caso del SO₂ se necesitan dos moleculas de oxigeno para que reaccione con el azufre con valencia +2 y asi equiparar los valores de valencias para que quede 0.
Es decir que el numero de valencia del azufre es +2 y el del oxigeno es -1, (por eso no es molecular)de esta manera si no multiplicamos al oxigeno por dos o no ponemos en claro que serian dos moleculas las que reaccionan el valor de la suma de las dos valencias no nos daria 0.
Entonces para poder solucionar dicho fenomeno en el espacio de abajo a la derecha se le suma un 2 al oxigeno (O₂) y asi el -1 se multiplica con el 2 dando como resultado una valencia total de -2 (para el oxigeno) que da 0 al sumarla con la +2 del azufre.