what if compound has those metalloids(metal near stair case) with gas element, is it going to be semiconductor. Can you think of any other compound with metalloid and gas elements beside SiO2 that is insulator

Certainly I'm not an expert on semiconductors but I don't think adding a gas is what makes those metalloids semiconducting. I think its the Si + the doping element or the Ga + doping element. The way I understand it, the doping element is critical and the concn of the doping element is critical. And for insulators, aren't As3O3, As2O5, SnO2, SnO, etc insulators?

Read about Silicon Nitride Si3N4

When considering compounds with metalloids (elements near the staircase on the periodic table) and gas elements, it is important to understand that the overall characteristics and properties of the compound will depend on the specific elements involved and their arrangement.

In general, metalloids have properties intermediate between metals and nonmetals, whereas gas elements tend to be nonmetals. Combining a metalloid with a gas element can result in a compound that exhibits varying levels of conductivity.

If the metalloid and gas element form a compound with a bonding arrangement that allows for the presence of free electrons or electron mobility, then the compound might exhibit semiconductor properties. Semiconductor materials are characterized by their ability to conduct electricity under certain conditions but have limited conductivity compared to metals.

Silicon dioxide (SiO2) is a good example of a compound containing a metalloid (silicon) and a gas element (oxygen) that is an insulator rather than a semiconductor. This is because in the SiO2 crystal structure, silicon and oxygen atoms are linked together through covalent bonding, forming a three-dimensional network. This network structure does not allow for the presence of free electrons or electron mobility, resulting in an insulating behavior.

To find other compounds with metalloids and gas elements that act as insulators, you can explore different combinations. For example, compounds such as boron nitride (BN) and arsenic sulfide (As2S3) can also exhibit insulating properties. Boron nitride is composed of boron (metalloid) and nitrogen (gas element), while arsenic sulfide consists of arsenic (metalloid) and sulfur (nonmetal).

Keep in mind that the behavior of compounds can vary greatly depending on factors such as bonding arrangements, crystal structures, and other chemical properties. Therefore, it is always beneficial to consult reliable sources or conduct further research to confirm the properties of specific compounds.