Section 10.7- Noble Gases

Question 1

all of the _______ occur as monatomic gases in their uncombined form

Answer 1

noble gases

Question 2

noble gas found in natural gas in a concentration of about .5%-2.4% by volume

Answer 2

helium

Question 3

uses of helium

Answer 3

1. lifting gas in airships and helium balloons
2. coolant
3. dilute oxygen in air used by divers

Question 4

uses of noble gases

Answer 4

1. incandescent light bulbs
2. electric discharge lamps
3. neon signs
4. fluorescent lamps
5. excimer lasers