Question

hydrogen reacts with an element to form a compound. which element would have the most valence electrons available to react with hydrogen?
oxygen
chlorine
neon
nitrogen

Explanation:

• Oxygen: Oxygen has 6 valence electrons. It can react with hydrogen to form \(H_2O\).
• Chlorine: Chlorine has 7 valence electrons. It can react with hydrogen to form \(HCl\).
• Neon: Neon is a noble gas with 8 valence electrons. It is chemically inert and does not readily react with hydrogen.
• Nitrogen: Nitrogen has 5 valence electrons. It can react with hydrogen to form \(NH_3\).

Since chlorine has the highest number of valence electrons (7) among the reactive elements (excluding neon which is inert), it has the most valence electrons available to react with hydrogen.

Answer:

chlorine