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Across 2. from L to R, IE ____ 5. group 2 has ___ VE 7. group 1 metals must be stored in this 8. cations are ____ than neutral atoms 9. number of metalloids 10. one of the three elements predicted by Mendeleev 12. group 17, dark red liquid 15. **Linus was catching snowflakes on his tongue and said they needed what 16. He presented a method for measuring relative masses of atoms 17. an issue scientists of the 1860's had was determining the ____ of new elements 18. **who kisses Lucy during the play practice 19. Henry Moseley was working with this scientist in 1911 22. group 17 24. the ability of an atom in a chemical compound to attract electrons from another atom in a compound 25. removing electrons from an already positive ion can be done if enough ____ is added 26. 1/2 the distance between the nuclei of identical atoms bound together 27. when elements were arranged by increasing atomic mass, there were similarities in chemical properties 29. the total number of electrons in the HOEL of elements in the p block is equal to group number minus ___ 32. the First International Congress of Chemists was held here 33. elements in s and p block 35. electrons further from the nucleus are shielded from the nucleus by inner electrons 37. synthetic group 17 element 38. energy required to remove one electron from a neutral atom 41. one of the three elements predicted by Mendeleev 43. atomic numbers 90-103 44. extremely reactive metals 46. he developed a scale of numerical values to reflect the tendancy for an atom to attract electrons 48. he wrote a textbook that organized elements according to properties 49. He discovered that helium is found on earth 51. one of the men that discovered Argon 52. with each successive electron removed, the IE ____ 54. he discovered radon 55. these divisions on the PT have similar properties 56. group with the highest electron affinity 57. anions are ___ than neutral atoms

Down 1. value of the most electronegative element 2. group 17, purple solid 3. group 2 4. **the color of Christmas tree Lucy wanted Charlie Brown to get 6. most electronegative element 11. one of the three elements predicted by Mendeleev 13. actinides are all ____ 14. Atomic numbers 58-71 17. Group 1 20. energy change that occurs with the addition of an electron 21. d block elements 23. from L to R, radius ____ 28. atom or group of atoms with a charge 30. physical and chemical properties of elements are periodic in functions of the atomic number 31. **how much does Lucy charge for her psychiatric help 34. halogens react with most metals to form ___ 36. In 1860, scientists had to learn the ____ of the new elements 39. First to arrange elements on PT by atomic number 40. outer most electrons 42. from bottom to top, radius ____ 45. one of the noble gases discovered by Ramsay 47. horizontal row 49. Where was Dmitri Mendeleev from 50. group 16 has ____ VE 53. **what did Sally ask Santa for in the letter she had her brother Linus write for her