6. At the positive electrode, which substances form first?
- Gases
- Halides
- Oxides
- Hydroxides
7. What is true about isotopes?
- Mass number is different, atomic number is different.
- Mass number is different, atomic number is the same.
- Mass number is the same, atomic number is different.
- Mass number is the same, atomic number is the same.
8. Acid + Metal = ?
- Salt + Water
- Salt + Water + Hydrogen
- Salt + Hydrogen
- Salt + Water + Carbon Dioxide