1													2					3
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6				7				8										9
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							14		15								16
17												18		19			20
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			22
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				25													26				27		28
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		35							36				37
						38														39		40
		41										42
	43

Across 4. group 1 ..... 1 valence electrons 6. can never be changed...... indicates the number of atoms in a compound.....written in very small writing 9. chlorine is a member of the __________ (family name) 11. the right side of the periodic table contains these 12. a column 13. Name KCl 16. the left side of a chemical reaction 17. this element has a mass number of 12 20. NO2 with a -1 charge as a polyatomic ion 21. these are used to name covalent compounds 22. another word for metalloids..... refers to thier ability to sometimes conduct electricity 23. sharing electrons in this type of bond 25. this group is located in the middle of the periodic table and can have multiple charges 28. hydrogen has ____ valence electrons 29. always treat hydrogen as a __________(its is an exception to being placed on the left side of the periodic table) 33. argon has ____valence electrons 36. a compound that has 3 or more elements 39. the left side of the periodic table contains these 41. a compound that has 2 elements 42. prefix for 2 43. prefix for 6

Down 1. loses electrons and becomes positive 2. group 2.... 2 valence electrons 3. U is the abbreviation for 5. touches the stairstep 6. SO4 with a -2 charge as a polyatomic ion 7. name CO2 8. the flourine on the periodic table has _____ neutrons 10. this element has 8 protons 14. these can be changed to balance chemical equations 15. this groupd has 7 valence electrons 18. using a picket fence and mole to mole rations to predict amounts of reactants and products 19. a row 24. prefix for 4 25. W is the abbreviation for 26. NH4 with a +1 charge as a polyatomic ion 27. outer shell electrons 30. the right side of a chemical reaction 31. an equals in a chemical reaction 32. transfer of electrons in this type of bond 34. the number of valence electrons for aluminum 35. gases in group 18 37. gains electrons and becomes negative 38. this element can have either a +2 or a +3 charge and rusts when exposed to water 39. an amout of matter that is quantative (coefficients in balanced equations) 40. the number of valence electrons for calcium