Answer:
2. nonmetals and metals
Step-by-step explanation:
Most of the groups in the periodic table of the elements are vertical columns, also known as groups. These groups are numbered 1 through 18 and are typically labeled on the left-hand side of the periodic table. Elements within a group have similar chemical properties and characteristics. For example, group 1 is known as the alkali metals and includes elements like lithium, sodium, and potassium. Group 17 is known as the halogens and includes elements like fluorine, chlorine, and bromine. There are a few exceptions to this general pattern, such as the lanthanides and actinides, which are not typically included in the main body of the periodic table.