Butane and methyl propane are an example of a pair of

They are a pair of structural isomers because they both have the same chemical formula of C4H10 ingrained in each other

The correct answer is c b c a d

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.