Oxidation Numbers of Main-Group Elements - Grouped Questions

1. What is the common oxidation number of the following elements: Nitride (N³⁻), Phosphide (P³⁻)?

2. What are the common oxidation numbers of the following elements: Carbon (C), Silicon (Si)?

3. What is the common oxidation number of Hydrogen (H)?

4. What is the common oxidation number of the following elements: Oxide (O²⁻), Sulfide (S²⁻)?

5. What is the common oxidation number of the following elements: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs)?

6. What is the common oxidation number of Aluminum (Al)?

7. What is the common oxidation number of the following elements: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba)?

8. What is the common oxidation number of the following elements: Fluoride (F⁻), Chloride (Cl⁻), Bromide (Br⁻), Iodide (I⁻)?