Pergunta

Which of the following -s an ionic compound? Cl2 CO2 HCN MgCl2
Solução

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AlexandreElite · Tutor por 8 anos
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The correct answer is $MgCl2$.<br /><br />Ionic compounds are formed when a metal atom donates one or more electrons to a non-metal atom, resulting in the formation of positively charged metal ions and negatively charged non-metal ions. These ions are held together by strong electrostatic forces of attraction.<br /><br />In the given options, $Cl2$ is a diatomic molecule composed of two chlorine atoms, $CO2$ is a covalent compound formed by the sharing of electrons between carbon and oxygen atoms, and HCN is a covalent compound formed by the sharing of electrons between hydrogen, carbon, and nitrogen atoms.<br /><br />On the other hand, $MgCl2$ is an ionic compound formed by the transfer of electrons from magnesium (a metal) to chlorine (a non-metal). In this compound, magnesium loses two electrons to form a $Mg^{2+}$ ion, while chlorine gains one electron to form two $Cl^{-}$ ions. The resulting ionic compound is $MgCl2$, where the positive and negative ions are held together by strong electrostatic forces of attraction.
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