Across
- 3. a substance with excess hydroxide ions
- 5. a base that can dissolve in water
- 9. a reaction that releases energy
- 10. positive charged particle in an atom
- 11. an acid is this
- 14. is known as the Mother of the atom bomb
- 15. an isotope that is radioactive
- 16. the process where one reaction produces particles that continue the reaction
- 19. a chemical reaction to release energy from food
- 21. very high-energy electromagnetic radiation given off during radioactive decay
- 22. negative charged particle in an atom
- 23. a substance that changes colours in acid or base solutions
- 25. the total number of protons and neutrons in an atom
- 27. nuclear power plants generate this
- 28. this is acidic due to dissolved air pollutants
- 31. the centre of an atom
- 32. the reaction of two small nuclei into a larger one
Down
- 1. these particles are high-speed electrons
- 2. the time required for half the atoms of a sample to break down
- 4. a reaction that absorbs energy
- 6. the law that says the total mass of products equals the mass of the reactants
- 7. a scale from 1 to 14
- 8. a substance with excess hydrogen ions
- 12. atoms of the same element that have the same number of protons, but different number of neutrons
- 13. the reaction of an acid and base
- 17. the number of protons in the nucleus of an atom
- 18. these particles are positively charged helium nuclei
- 20. his experiment identified the nucleus in atoms
- 24. a base is this
- 26. the splitting of a large nucleus into smaller parts
- 29. produced when an acid reacts with a base
- 30. neutral charged particle in an atom