Question

question 19
2 pts
which of the following elements is not reactive (will not react with other elements to form a bond)?
argon (ar)
hydrogen (h)
fluorine (f)

Explanation:

Argon (Ar) is a noble gas. Noble gases have a full valence electron shell. This electron configuration makes them very stable and unreactive as they do not need to gain, lose, or share electrons to achieve a stable state. Hydrogen (H) has one valence electron and readily reacts (e.g., forms H₂ or compounds like H₂O). Fluorine (F) has seven valence electrons and is highly reactive (e.g., forms compounds like NaF).

Answer:

Argon (Ar)