Across
- 3. makes up 20 percent of air what we breath
- 5. Reaction in which appearance is changed
- 6. Reaction new substance is formed
- 8. whether or not something is dissolvable
- 9. particle with neutral charge
Down
- 1. Elements such as hydrogen, oxygen,etc are called
- 2. number 49 on periodic table
- 4. Used to blow up balloons
- 5. the charge of the element zinc
- 7. Element which creates a yellow reaction