Final answer:
Si₂Br₆ is a covalent compound named disilicon hexabromide. It is formed through the sharing of electrons between nonmetal atoms, as contrasted with ionic compounds which are formed from the transfer of electrons and consist of ions.
Step-by-step explanation:
The compound Si₂Br₆ is covalent. This is because it is formed by the sharing of electrons between the silicon atoms and the bromine atoms, which are both nonmetals. Covalent compounds typically involve the sharing of electrons between nonmetal atoms. Examples of covalent compounds include water (H₂O) and carbon dioxide (CO₂).
The name of the covalent compound consisting of two atoms of silicon and six atoms of bromine is called diboron hexabromide. However, this seems to be an error, as it should be named as disilicon hexabromide, with the correct chemical formula Si₂Br₆.
When comparing ionic and covalent compounds, ionic compounds are typically formed by the transfer of electrons from a metal to a nonmetal, resulting in the formation of positively charged cations and negatively charged anions that are held together by electrostatic forces. They are often solid at room temperature, have high melting and boiling points, and conduct electricity when dissolved in water. Conversely, covalent compounds, like disilicon hexabromide and silicon tetrachloride (SiCl₄), involve the sharing of electrons between nonmetals, have lower boiling points compared to ionic compounds, are often liquids or gases at room temperature, and do not conduct electricity.