1		2								3								4
5										6
7
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							9										10
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14
15	16				17						18
															19				20
			21														22

Across 5. Isotopes are atoms of the same type but have different numbers of these 6. The number of protons and neutrons combined 7. The number of protons an atom has 10. The smallest particle of an element 11. Negatively charged particle outside of the nucleus of the atom 12. How many more electrons do group 6a elements "want" to gain 13. An element in the third row of the periodic table is in this principal energy level 14. The electrons involved in bonding 15. Two atoms of the same type that have different weights 18. The number of valence electrons in an atom in group 1a 19. The number of valence electrons in an atom in group 8a 21. When an atom has 8 valence electrons 22. The maximum number of electrons that an orbital can contain

Down 1. Neutral particle in the nucleus of the atom 2. Atoms in the periodic table are arranged according to their _______________ 3. Outermost electrons 4. By subtracting the atomic number from the mass number you can determine the number of these 8. The number that identifies the kind of atom you have 9. The weighted average of all the isotopes of an atom 12. How many bonds group 6a elements want to make 13. Another way of referring to group 3a 16. When an atom has an octet it is very ____________ 17. Positively charged particle in the nucleus of the atom 20. The number of valence electrons in an atom in group 2a