Answer:
Generally, D) non-metals are gases which are at room temperature.
Explanation:
Those metals which lack the property of the metal are called as non-metal. Usually they are characterized by the following features:
- Nonmetals don't conduct electricity through them.
- Nonmetals don't allow heat to pass through them.
- They don't show ductility and malleability.
- The nonmetals not only include gases but there are some solids which do not exhibit the above mentioned characters are also nonmetals. Some of the solid nonmetals includes graphite, carbon, wood, and so on.
Thus, from the above data, it can be inferred that option D which states that gases at room temperature is considered as most suitable answer for non-metals, as option A, B, and C are characteristic of metals.
