In covalent bonds, non-metals share electrons to attain full valence shells.
This non-metal usually forms 2 covalent bonds. This leads me to believe that it has 6 valence electrons to begin with and will take 2 more, one from each bonds. Such that it ends with a full valence shell of 8 electrons.
Alloys are the homogeneous mixture of metals and non metals.... they are used in making cars and jewellery to make them more featurable,,, means that they would possess high regidity to the destruction .... both features of metal and nonmetal