Physical Science Crossword-SallyAnn Morris

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Across
  1. 2. atoms as a source of nuclear energy.
  2. 5. a red-brown metal, the chemical element of atomic number 29.
  3. 8. a colorless, odorless, highly flammable gas, the chemical element of atomic number 1.
  4. 10. 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.
  5. 11. the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.
  6. 12. the chemical element of atomic number 18, an inert gaseous element of the noble gas group. Argon is the most common noble gas, making up nearly one percent of the earth's atmosphere.
  7. 14. the chemical element of atomic number 53, a nonmetallic element forming black crystals and a violet vapor.
  8. 15. a silvery-white metal, the chemical element of atomic number 50.
  9. 17. the chemical element of atomic number 6, a nonmetal which has two main forms (diamond and graphite) and which also occurs in impure form in charcoal, soot, and coal.
  10. 19. the chemical element of atomic number 16, a yellow combustible nonmetal
Down
  1. 1. the chemical element of atomic number 20, a soft gray metal.
  2. 3. the chemical element of atomic number 2, an inert gas which is the lightest member of the noble gas series.
  3. 4. colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
  4. 6. the chemical element of atomic number 5, a nonmetallic solid.
  5. 7. the chemical element of atomic number 27, a hard silvery-white magnetic metal.
  6. 9. the chemical element of atomic number 3, a soft silver-white metal. It is the lightest of the alkali metals.
  7. 11. the chemical element of atomic number 14, a nonmetal with semiconducting properties, used in making electronic circuits. Pure silicon exists in a shiny dark gray crystalline form and as an amorphous powder.
  8. 13. the chemical element of atomic number 10, an inert gaseous element of the noble gas group. It is obtained by the distillation of liquid air and is used in fluorescent lamps and advertising signs.
  9. 16. a silvery-white metal, the chemical element of atomic number 28.
  10. 18. the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.