Write the names of the following covalent compounds:

1. SiO2

2. SF6

3. NH3

4. Nitrogen Trichloride

5. Oxygen difluoride

6. Carbon Disulfide

Write the names of the following ionic compounds:

1. NaBr

2. CaO

3. Li2S

4. Potassium iodide

5. Magnesium acetate

6. Ammonium Chloride