Question

which of the following elements has a valence of 3? answer options: select one of four aluminum mercury chlorine potassium

Explanation:

To determine which element has a valence of 3, we analyze each option:

• Aluminum (Al) typically has a valence of 3, as it tends to lose 3 electrons to achieve a stable electron configuration.
• Mercury (Hg) commonly has valences like +1 or +2.
• Chlorine (Cl) usually has a valence of -1 (or +1, +3, +5, +7 in some compounds, but -1 is most common).
• Potassium (K) has a valence of +1, as it loses 1 electron.

Answer:

A. Aluminum