To match the elements based on their number of valence electrons:
- Carbon (C) has 4 valence electrons. It matches with Silicon (Si), which also has 4 valence electrons.
- Hydrogen (H) has 1 valence electron. It does not have a direct match from the provided options but typically matches with elements like lithium (Li) or sodium (Na) in its group.
- Oxygen (O) has 6 valence electrons. It matches with Sulfur (S), which also has 6 valence electrons.
- Argon (Ar) has 8 valence electrons. It matches with Neon (Ne), which also has 8 valence electrons.
So the matches would be:
- Carbon - Silicon
- Hydrogen - (no direct match)
- Oxygen - Sulfur
- Argon - Neon