Answer:
- in the columns for metals and for metalloids
Explanation:
There are six elements that are always classified as metalloids: boron, silicon, germanium, arsenic, antimony, and tellurium. Pollonium is also, generally, classified as a metalloid,
Metalloids have intermediate electronegativity values (in between that of metals and nonmetals), which is responsible for some similarities (or in between properties) with metals and some similarites with non metals.
An example of such properties that metals and metalloids have in common is that they have relative high melting points. Metalloids are all solid at room temperature, such as most metals.
Other property that both metals and metalloids share is that they can react with oxygen to form oxides that are amphoteric.
Amphoteric compounds are substances that can behave as a base or as an acid, depending on the other compound with which they react.
For instance, among metal oxides, aluminum hydroxide, Al(OH)₃, will act as a base when reacts with hydrochloric acid, HCl, and will react as an acid when reacts with sodium hydroxide, NaOH.
The oxides of metalloids are usually amphoteric.
