Across
- 1. Scale used to measure acidity or alkalinity
- 2. Substance with pH less than 7
- 6. Substance made from one type of atom
- 7. Element essential for strong bones and teeth
- 10. Substance made from two or more elements chemically combined
- 13. Element important for muscle contraction and heart function
- 14. Particle with no charge
Down
- 1. A type of change that does not form a new substance
- 2. Smallest unit of an element that retains its properties
- 3. Element required for oxygen transport in the blood
- 4. A type of change that produces a new substance
- 5. Substance with pH greater than 7
- 8. Element that helps regulate fluid balance and nerve function in the body
- 9. Charged atom or molecule
- 11. Group of atoms bonded together
- 12. Element needed for enzyme activity and muscle function
- 13. Positively charged particle