Potassium-40 (k-40) decays into argon-40 (ar-40). which of the following are true statements? select all that apply. a. k-40 is the parent, and ar-40 is the daughter. b. ar-40 is the parent, and k-40 is the daughter. c. a rock sample containing a relatively small amount of ar-40 is old. d. a rock sample containing a relatively small amount of ar-40 is young.

The correct answers are options A. "K-40 is the parent, and Ar-40 is the daughter" and D. "A rock sample containing a relatively small amount of Ar-40 is young".

Explanation:

Potassium-40 (K-40) is a radioactive isotope that decays into argon-40 (Ar-40) with a really long half-life of 1.251 billion years. Since K-40 is the one that produces Ar-40, K-40 is considered the parent isotope and Ar-40 is considered the daughter isotope. This phenomenon is used to date rocks, known as the potassium–argon dating approach. A rock sample containing a relatively small amount of Ar-40 is young, because K-40 takes a long time to decay and the more Ar-40 is in the rock the more time has passed since the rock was created.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

bcde is the incorrect answer it is a