Across
- 3. , each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
- 4. change , occur when a substance combines with another to form a new substance
- 8. reaction ,a process that involves rearrangement of the molecular or ionic structure of a substance
- 9. , stable subatomic particle occurring in all atomic nuclei
Down
- 1. changes, are changes affecting the form of a chemical substance
- 2. , the building blocks of everything
- 5. , stable subatomic particle with a charge of negative electricity
- 6. , atomic particle of about the same mass as a proton but without an electric charge
- 7. , ph of Alkaline