Question

question 15 0.25 pts which of the following elements may react chemically? choose all that apply. ar h al he

Explanation:

Step1: Recall noble gas stability

Noble gases are chemically inert due to their full - valence electron shells. Ar (argon) and He (helium) are noble gases.

Step2: Identify reactive elements

Hydrogen (H) and aluminum (Al) are not noble gases. H has 1 valence electron and can form various compounds by sharing or losing this electron. Al has 3 valence electrons and can participate in chemical reactions to achieve a stable electron configuration.

Answer:

H, Al