Question

what trend does the reactivity of most nonmetals show in a periodic table, excluding the noble gases? random changes without any trends on the periodic table changes according to trends on the periodic table increases from left to right across the periodic table decreases from left to right across the periodic table

Explanation:

Non - metals tend to gain electrons. As you move from left to right across a period in the periodic table (excluding noble gases), the effective nuclear charge increases, making it easier for non - metals to gain electrons. So, their reactivity increases.

Answer:

C. increases from left to right across the periodic table