You are given a gray substance that melts at 700 °C; the solid is a conductor of electricity and is insoluble in water. Which type of solid (molecular, metallic, covalent-network, or ionic) might this substance be?

Video transcript

Hi everyone here we have a question telling a substance melts at 3350 degrees. Celsius is an excellent thermal conductor but not an electrical conductor. What type of solid is this substance? So let's look at ionic First, our options are metallic Covalin Network. Ionic or molecular. So ionic is a metal and a nonmetal. It's held by ionic bonds, has high melting and glowing points and it's vance electrons are confined to the an ions making them electrical insulators. So our answer is not ionic. Next let's look at molecular that is composed of violent bonds. It has a low melting point. So it is not molecular. Now let's look at metallic is composed of a metal and another medal or just middle by itself. Its electrons are de localized so they are conductors. So our answer isn't a. Now let's look at Covalin Network. It's also called network solid and where atoms are bonded by Covalin bonds in a single continuous network. It has hard solids, high melting points, thermal conductors but not electrical conductors. So our answer here is be Covalin Network. Thank you for watching. Bye.