Across
- 3. Atom or molecule with a net electric charge
- 7. Atoms of the same element with different numbers of neutrons
- 12. Negatively charged particle
- 13. Two or more atoms bonded together
- 14. Connection between atoms
- 15. Positively charged particle
- 16. Electrons in the outer shell of an atom
- 17. Substance that speeds up a chemical reaction
- 20. Pure substance consisting of one type of atom
Down
- 1. Substance that donates protons
- 2. Substance that accepts protons
- 4. Center of an atom containing protons and neutrons
- 5. Substance that dissolves a solute
- 6. Substance dissolved in a solvent
- 8. Neutral particle in the nucleus
- 9. Substance composed of two or more elements
- 10. Process of chemical change
- 11. Table of elements
- 15. Measure of acidity or basicity
- 18. Basic unit of a chemical element
- 19. Product of an acid-base reaction