Home / shia labeouf dating / Potassium 40 argon 40 dating

Potassium 40 argon 40 dating

The decay of potassium-40 to argon-40 explains why there is so much argon in the atmosphere, compared with the other noble gases.Almost all atmospheric argon (99.6%) is argon-40, whereas the argon in the Sun and stars, produced by stellar nucleosynthesis, is mostly argon-36.Of this, only 0.012% (.00012) is radioactive potassium-40.Thus, the crustal abundance of potassium-40 is: 0.012 x 0.00012 = 1.4 x 10] = 19 parts per million potassium-40 when the Earth formed Shortly after the Earth formed, the abundance of potassium-40 was 19 parts per million. That means that 17.6 parts per million of the crust, in the form of potassium-40, has decayed away over the past 4.5 billion years.

The proportionality is related to the probability or “. Or if the rock is subject to atmospheric conditions, the argon gas will mostly flow out of the rock and one can account for the presence of atmospheric argon gas in the rock.

If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.and *.are unblocked.

Note: The calculations have a precision of two significant digits.

Your answers might be slightly different due to rounding.


  1. Calculation of the decay of potassium-40 in the Earth's crust to make argon-40

  2. Potassium-argon datingOther creationists such as paul giem in his book, The ratio of ar-40 / ar-36 = 295. In other words, he checks to see if his calculated result.

  3. Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in geochronology and archaeology. When 40 K decays to 40 Ar argon.

Leave a Reply

Your email address will not be published. Required fields are marked *