Across
- 1. the d-block elements with typical metallic properties and are often referred to as
- 4. a measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound
- 8. Ce
- 10. the elements of Group 17 of the periodic table
- 13. Fr
- 14. the horizontal columns of the periodic table
- 16. the elements of Group 2 of the periodic table
- 21. a negative ion
- 22. The energy change that occurs when an electron is required by a neutral atom
- 23. Lu
- 25. an atom or group of bonded atoms that has a positive or negative charge
- 26. the physical and chemical properties of the elements are periodic functions of their atomic numbers.
- 27. an arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column, or group.
- 29. the elements of Group 1 of the periodic table
- 30. developed a method that led to the determination of standard relative atomic masses
Down
- 2. Lr
- 3. p-block elements together with the s-block elements
- 5. element 6
- 6. the electrons available to be lost, gained or shared in the formation of chemical compounds
- 7. the vertical columns of the periodic table
- 9. element 30
- 11. Na
- 12. the 14 elements with atomic numbers from 58 (cerium, Ce) to 71 (lutetium, Lu).
- 15. element 7
- 17. the 14 elements with atomic numbers from 90(thorium, Th) to 103 (lawrencium, Lr).
- 18. the energy required to remove one electron from a neutral atom of an element
- 19. element 1
- 20. element 90
- 24. the elements of Group 18 of the periodic table
- 28. a positive ion