Question

helium (he), neon (ne) and argon (ar) are all colorless, odorless gases with low chemical reactivity. based on the periodic table, which other element would also have those same properties?
a. chlorine (cl)
b. carbon (c)
c. xenon (xe)
d. selenium (se)

Explanation:

Helium (He), neon (Ne), and argon (Ar) are noble gases. Noble gases are colorless, odorless, and have low chemical reactivity. Xenon (Xe) is also a noble gas. Chlorine (Cl) is a halogen, carbon (C) is a non - metal in group 14, and selenium (Se) is a chalcogen. Only xenon among the options has similar properties to He, Ne, and Ar as it belongs to the same group of noble gases on the periodic table.

Answer:

C. xenon (Xe)