Question

the lewis dot diagram for an unidentified element is shown below. which element could x represent? iron chlorine silicon oxygen

Explanation:

Lewis dot diagrams show valence electrons. Chlorine has 7 valence electrons. Iron is a metal (does not use Lewis dot in this context as metals have delocalized electrons). Silicon has 4 valence electrons. Oxygen has 6 valence electrons. Counting the dots in the diagram (7 dots), chlorine is the match as it has 7 valence electrons.

Answer:

chlorine