Potassium-40 decays into daughter isotopes with a half-life of ...

[kamilo84]

Potassium-40 decays into daughter isotopes with a half-life of _____.
 
  A) 1.25 billion years
  B) 1.5 billion years
  C) 1.75 billion years
  D) 2 billion years

Question 2

__________is the sticking together of solid particles to produce a larger particle.
 
  A) Condensation
  B) Compression
  C) Accretion
  D) Differentiation

[akpaschal]

Answer to Question 1

A

Answer to Question 2

C

[kamilo84]

Thanks for the timely response, appreciate it

[raili21]

Excellent