Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    4
    ReputationRep:
    This question has been puzzling me for hours!

    A sample of gas contains 8g of radon-222.
    How much radon-222 will decay in 15.2 days?
    Offline

    9
    (Original post by Saywhatyoumean)
    This question has been puzzling me for hours!

    A sample of gas contains 8g of radon-222.
    How much radon-222 will decay in 15.2 days?

    You need to know the half life of radon to do this.

    The half life of radon is 3.8 days. Was this given in the question?

    For each half life period of 3.8 days, half of the radon will decay. (By definition)
    The time interval you have is 15.2 days.
    What conclusion would you draw from this?
    • Thread Starter
    Offline

    4
    ReputationRep:
    (Original post by Stonebridge)
    You need to know the half life of radon to do this.

    The half life of radon is 3.8 days. Was this given in the question?

    For each half life period of 3.8 days, half of the radon will decay. (By definition)
    The time interval you have is 15.2 days.
    What conclusion would you draw from this?
    Oh I see,
    yes the half life was given at the start of the question, thanks
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Would you like to hibernate through the winter months?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.