Answer the following questions in a minimum of 100 words.
1. Why does silicon form only single bonds with oxygen but carbon, which is in the same family as silicon, form double bonds with oxygen in many compounds?
2. Describe the difference between a substitutional alloy and an interstitial alloy?
3. When a transition metal atom forms an ion, which electrons are lost first?
4. Explain the difference between weak-field and strong-field metal complexes.