Noble Gases

1234567
Across
  1. 2. How many valence electrons do the Noble Gases have?
  2. 4. The Noble Gases can't react with other elements because of their 8 valence electrons. Therefore they are...
  3. 5. One of the lightest elements on the Periodic Table, used to inflate balloons.
  4. 6. This element is used in camera flashes but it can be very harmful and cause lung cancer. It was discovered by German scientist Friedrich Dorn.
Down
  1. 1. This English physicist, along with John William Strutt, discovered argon. He proposed the idea of adding a new family to the periodic table.
  2. 3. Before being called the Noble Gases, this family on the periodic table was called the ________ Gases because they were thought to be unable to react.
  3. 7. The most known use for this element, is in lights. This type of light is produced by passing electrons through tubes of gas. It burns bright red but when other gases are added it can produce different colors.