Across
- 3. the chemical element of atomic number 101, a radioactive metal of the actinide series. It does not occur naturally and was first made in 1955 by bombarding einsteinium with helium ions.
- 4. the chemical element of atomic number 27, a hard silvery-white magnetic metal.
- 9. the chemical element of atomic number 59, a soft silvery-white metal of the lanthanide series.
- 10. the chemical element of atomic number 103, a radioactive metal of the actinide series. Lawrencium does not occur naturally and was first made by bombarding californium with boron nuclei
- 13. the chemical element of atomic number 65, a silvery-white metal of the lanthanide series. The main use of terbium is in making semiconductors.
- 15. a heavy, bluish-gray, soft, ductile metal, the chemical element of atomic number 82.
- 16. the chemical element of atomic number 108, a very unstable element made by high-energy atomic collisions.
- 18. the chemical element of atomic number 53, a nonmetallic element forming black crystals and a violet vapor.
- 20. a silvery-white metal, the chemical element of atomic number 50.
- 21. the chemical element of atomic number 104, a very unstable element made by high-energy atomic collisions.
- 24. the chemical element of atomic number 106, a very unstable element made by high-energy atomic collisions.
- 27. the chemical element of atomic number 88, a rare radioactive metal of the alkaline earth series. It was formerly used as a source of radiation for radiotherapy.
- 28. the chemical element of atomic number 73, a hard silver-gray metal of the transition series.
- 30. the chemical element of atomic number 66, a soft silvery-white metal of the lanthanide series.
- 32. the chemical element of atomic number 60, a silvery-white metal of the lanthanide series. Neodymium is a component of misch metal and some other alloys, and its compounds are used in coloring glass and ceramics.
- 35. the chemical element of atomic number 62, a hard silvery-white metal of the lanthanide series.
- 36. the chemical element of atomic number 98, a radioactive metal of the actinide series, first produced by bombarding curium with helium ions.
- 40. the chemical element of atomic number 58, a silvery white metal. It is the most abundant of the lanthanide elements and is the main component of the alloy misch metal.
- 42. the chemical element of atomic number 75, a rare silvery-white metal which occurs in trace amounts in ores of molybdenum and other metals.
- 43. the chemical element of atomic number 102, a radioactive metal of the actinide series. Nobelium does not occur naturally and was first produced by bombarding curium with carbon nuclei.
- 44. a silvery-white metal, the chemical element of atomic number 28.
- 45. the chemical element of atomic number 99, a radioactive metal of the actinide series. Einsteinium does not occur naturally and was discovered in 1953 in debris from the first hydrogen bomb explosion.
- 47. the chemical element of atomic number 105, a very unstable element made by high-energy atomic collisions.
- 48. the chemical element of atomic number 63, a soft silvery-white metal of the lanthanide series. Europium oxide is used with yttrium oxide as a red phosphor in color television screens.
- 49. the chemical element of atomic number 76, a hard, dense silvery-white metal of the transition series.
- 50. the chemical element of atomic number 71, a rare silvery-white metal of the lanthanide series.
Down
- 1. the chemical element of atomic number 100, a radioactive metal of the actinide series. Fermium does not occur naturally and was discovered in 1953 in the debris of the first hydrogen bomb explosion.
- 2. the chemical element of atomic number 4, a hard gray metal.
- 5. the chemical element of atomic number 109, a very unstable element made by high-energy atomic collisions.
- 6. the chemical element of atomic number 52, a brittle, shiny silvery-white semimetal
- 7. the chemical element of atomic number 93, a radioactive metal of the actinide series. Neptunium was discovered as a product of the bombardment of uranium with neutrons
- 8. the chemical element of atomic number 64, a soft silvery-white metal of the lanthanide series.
- 11. a strong, hard magnetic silvery-gray metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.
- 12. a red-brown metal, the chemical element of atomic number 29.
- 14. the chemical element of atomic number 107, a very unstable element made by high-energy atomic collisions.
- 17. a precious shiny grayish-white metal, the chemical element of atomic number 47.
- 19. a precious silvery-white metal, the chemical element of atomic number 78.
- 22. the chemical element of atomic number 72, a hard silver-gray metal of the transition series, resembling and often occurring with zirconium.
- 23. the chemical element of atomic number 74, a hard steel-gray metal of the transition series.
- 25. a yellow precious metal, the chemical element of atomic number 79.
- 26. the chemical element of atomic number 92, a dense gray radioactive metal used as a fuel in nuclear reactors.
- 29. the chemical element of atomic number 69, a soft silvery-white metal of the lanthanide series.
- 31. the chemical element of atomic number 32, a shiny gray semimetal. Germanium was important in the making of transistors and other semiconductor devices, but has been largely replaced by silicon.
- 33. the chemical element of atomic number 70, a silvery-white metal of the lanthanide series.
- 34. the chemical element of atomic number 61, a radioactive metal of the lanthanide series. It was first produced artificially in a nuclear reactor and occurs in nature in traces as a product of uranium fission.
- 37. the chemical element of atomic number 30, a silvery-white metal that is a constituent of brass and is used for coating (galvanizing) iron and steel to protect against corrosion.
- 38. the chemical element of atomic number 67, a soft silvery-white metal of the lanthanide series.
- 39. he chemical element of atomic number 51, a brittle silvery-white metalloid.
- 41. the chemical element of atomic number 49, a soft silvery-white metal occurring naturally in association with zinc and some other metals.
- 46. the chemical element of atomic number 80, a heavy silvery-white metal which is liquid at ordinary temperatures.