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

Across 2. The elements of Group 1 of the periodic table. 9. Are the 14 elements with atomic numbes from 90-103. 10. Is an atom or group of bonded atoms that has a positive or negative charge. 15. An arrangement of the elements in order of thier atomic numbers so that elements with similar properties fall in the same column, or group. 17. An element in the s-block or the p-block. 18. May be defined as one-half the distance between the nuclei of identical atoms that are bonded together.

Down 1. The d-block elements are metals with typical metallic properties. 3. Are the 14 elements with atomic numbers from 58-71. 4. The elements of Group 2 of the periodic table. 5. The electrons available to be lost, gained, or shared, in the fromation of chemical compounds. 6. The energy required to remove one electron from a neutral atom of an element. 7. The physical and chemical properties of the elements are periodic functions of thier atomic numbers. 8. Any process that results in the formation of an ion. 11. The energy changed that occurs when an electron is acquired by a neutral arom. 12. Is a measure of the ability of an atom in a chemical compound to attract electrons. 13. One of the elements of Group 17. 14. A positive ion. 16. A negative ion.