Question

which set of elements exhibit the most similar chemical properties?
o n, o, f
o he, br, rn
o li, na, k
o al, s, p

Explanation:

Elements in the same group of the periodic table have similar chemical properties. Li (Lithium), Na (Sodium), and K (Potassium) are all alkali metals in Group 1 of the periodic table. They have one valence electron and exhibit similar reactivity, such as reacting vigorously with water.

• N (Nitrogen), O (Oxygen), and F (Fluorine) are in different groups (Group 15, Group 16, Group 17 respectively).
• Al (Aluminum), S (Sulfur), and P (Phosphorus) are in different groups (Group 13, Group 16, Group 15 respectively).
• He (Helium) is a noble gas (Group 18), Br (Bromine) is a halogen (Group 17), and Rn (Radon) is a noble gas (Group 18), but they still have different chemical behaviors compared to a single - group set like alkali metals.

Answer:

Li, Na, K