1						2
		3
										4
		5
6						7											8
															9
				10					11		12
				13												14
15
																16
														17
																18
											19
									20
								21

Across 3. particles released from the nucleus during radioactive decay 4. reversibly change color depending on certain conditions 7. t 1/2 is its abbreviation 9. a cleaner that dissolves in water 10. Sodium Chloride 14. increases the number of hydroxide ions when dissolved in water 15. Nuclear ________ _________when one nuclear reaction causes an average of one or more nuclear reactions 16. forms hydrogen ions 18. _____ scale that determines acids and bases 19. disinfectant used to lighten or whiten 20. Detergents_______ dirt and oil 21. nuclear ____________ is the process where a large atomic nucleus is split into two smaller particles.

Down 1. a chemical compound in which one or more atoms have been replaced by a radioisotope. 2. kills viruses and bacteria 5. (s) can be blocked by 3 cm of Al 6. the smallest amount of fissile material needed for a sustained nuclear chain reaction. 8. _______ rays can be blocked by 7cm or more of lead 11. any substance that can dissolve in water 12. the ability for energy to be obtained by having very light nuclei combining to form heavier nuclei 13. neutralizes stomach acid 16. ______ particles has more mass that other particles, and can be blocked by a sheet of paper 17. Neutralization ______ neutralizes acids and bases when combined