Question 34

Group 15 contains metals, nonmetals, and metalloids.

Group 15 of the periodic table is known to include a variety of elements, such as nitrogen (a nonmetal), phosphorus (a nonmetal), arsenic (a metalloid), antimony (a metalloid), and bismuth (a metal). This diverse group showcases the presence of metals, nonmetals, and metalloids.

A) Group 1

Group 1 primarily consists of alkali metals, which are highly reactive and do not include nonmetals or metalloids. Elements in this group, such as lithium and sodium, are characterized solely as metals.

B) Group 15

Group 15 is unique as it contains a mix of metals, nonmetals, and metalloids. The presence of nitrogen and phosphorus as nonmetals, arsenic and antimony as metalloids, along with bismuth as a metal, makes this group a prime example of diverse elemental classifications.

C) Group 17

Group 17, also known as the halogens, consists mainly of nonmetals such as fluorine, chlorine, bromine, and iodine. While it includes one metalloid, astatine, it predominantly features nonmetals, thus lacking a significant representation of metals.

D) Group 18

Group 18 contains the noble gases, which are all nonmetals. Elements like helium, neon, and argon do not include metals or metalloids, as they are characterized by their complete electron shell and lack of reactivity.

Conclusion

Group 15 stands out as the only group that includes a blend of metals, nonmetals, and metalloids, making it the correct choice. In contrast, Groups 1, 17, and 18 are limited to specific categories of elements, lacking the diversity found in Group 15. Thus, the classification of elements in Group 15 aligns perfectly with the question's requirements.