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:

1. First, recall the number of valence electrons for each element:

• Oxygen (O) is in group 16, so it has 6 valence electrons.
• Chlorine (Cl) is in group 17, so it has 7 valence electrons.
• Neon (Ne) is a noble gas in group 18, it has 8 valence electrons but is inert and does not react with hydrogen under normal conditions.
• Nitrogen (N) is in group 15, so it has 5 valence electrons.

1. Now, compare the reactive elements (excluding neon as it's inert): chlorine has 7 valence electrons, oxygen has 6, and nitrogen has 5. So chlorine has the most valence electrons among the reactive options to react with hydrogen.

Answer:

B. chlorine