Now the orange guys are known as metalloids, while the red guys are known as nonmetals. Now group 18 is called the Noble gas group, while group 17, the group right next to group 18, are known as halogens. Now these guys here from this group to group number three are called transition metals. Group number one are known as alkaline metals, and group number two are known as alkaline earth metals. Now we're going to go into more detail in our next lecture about what the alkaline, alkaline, earth, noble halogens and transition metals are. In this lecture, we're only going to look at the three divisions that exist, namely metals, metalloids and nonmetals.