Identifying The Element      Answers
Using your own knowledge, your chemistry textbook, or any other appropriate chemistry resource book, identify the element, using each of the following clues.
 

 
Name
Symbol
1.   Used in house light bulbs, a gas. ________________ _______
2.  The gas used in coloured light signs ________________ _______
3. Makes up about 20% of the air ________________ _______
4. Plumbers in Rome used it for pipes, used less today ________________ _______
5. Used in film, turns black in light, negatives ________________ _______
6. Found in these forms: charcoal, graphite, diamond ________________ _______
7. Glows in the dark, on some hands of the clock ________________ _______
8. Main metal in 25 cents pieces today ________________ _______
9. Found in limestone, chalk, shells and teeth ________________ _______
10. Makes up 78% of the air ________________ _______
11. A gas, necessary for breathing ________________ _______
12. The metallic element in ordinary table salt ________________ _______
13. Used in photographic flash bulbs because it burns to produce a  brilliant white light, also fireworks. ________________ _______
14. The element used in electrical wiring and pennies ________________ _______
15. Element obtained commercially from seawater ________________ _______
16. The protective coating on water taps, shiny ________________ _______
17. The elements in ordinary fertilizer ________________ _______
18. Metal element that carries oxygen in the blood ________________ _______
19. The second most abundant element in the Earth's crust  - found in glass. ________________ _______
20. Used to kill bacteria in swimming pools ________________ _______
21. The element used in your good cutlery ________________ _______
22. The alloy of copper and this element make brass ________________ _______
23. Quicksilver, used in fluorescent light tubes ________________ _______
24. The element used in making steel ________________ _______
25.  The element produced in Kitimat BC from bauxite ________________ _______
26. The element used in light-bulb filaments ________________ _______
27. The element that used to be added to most gasolines to prevent knocking  ________________ _______
28. Used in match heads, rubber tires, and insecticides ________________ _______
29. In toothpaste, protective coating for teeth, Teflon ________________ _______
30. A metal used for jewellry, white, high monetary value ________________ _______
31.  The element used in thermometers ________________ _______
32. The lightest known gas: sun consists mainly of it ________________ _______
33. Used for X-ray and radiation shields ________________ _______
34. Latin name aurum, used to fill holes in teeth ________________ _______
35. Added to ordinary table salt to control thyroid trouble ________________ _______
36. An element used in nuclear reactors for energy ________________ _______
37. An element named after the planet Pluto - stays radioactive for millions of years, dangerous ________________ _______
38. In honour of Pierre and Marie Curie, pioneers in the field of radaioactivity ________________ _______
39.  The lead in lead pencils ________________ _______
40. Bronze is composed of copper and this element ________________ _______
41. The center electrode post of ordinary flashlight batteries    ________________ _______
42. The metal plates in car batteries ________________ _______
43. Used in the making of atomic clocks that lose one second every 300 years ________________ _______
44. Used in the making of supersonic airplane wings and artificial joints for bones,  modern submarine hulls ________________ _______
45. Used to make high-speed drills and abrasives ________________ _______
46. Used to make light-sensitive photo cells for camera, electric eyes and fire alarms ________________ _______
47. Used extensively in making transistors and chips ________________ _______
48. Used in poisons to kill rats and insects ________________ _______
49. Used as a catalyst in catalytic converters in car exhaust systesm to get rid of pollution ________________ _______
50. Used in the Goodyear blimp and other dirigibles ________________ _______