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

Across 5. smallest particle of a pure element 6. atomic __________ is the proton count in a nucleus 7. positively charged part of atom 8. part of atom without electric charge 9. Small, massive center of atom 12. atomic __________ is the count of protons and neutrons 14. smallest particle of a pure compound 16. atoms of same element but different numbers of neutrons 18. protons and neutrons in nucleus 19. substance with only one type of atom

Down 1. atoms with more or less electrons than protons 2. nucleus possesses almost all of the _________ of an atom 3. nucleus occupies very little of the _________ of an atom 4. lack of and electrical charge 8. electrical charge on an electron 10. negatively charged part of atom 11. electrons are restricted to _________ in the Bohr atomic model 13. substance whose particles are atoms bonded to each other 15. electrical charge on a proton 17. electrical polarity on protons and electrons