Solved

The Radioisotope Potassium-40 Decays to Argon-40 by Positron Emission with a Half-Life

Question 124

Multiple Choice

The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 × 109 yr.A sample of moon rock was found to contain 78 argon-40 atoms for every 22 potassium-40 atoms.The age of the rock is


A) 8.1 × 10-10 yr
B) 2.4 × 109 yr
C) 2.8 × 109 yr
D) 4.6 × 109 yr
E) 6.8 × 109 yr

Correct Answer:

verifed

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions