Author Question: You are trying to determine the age of a lava flow using an isotope with a half-life of 1.5 million ... (Read 189 times)

bb · **on:** Jul 16, 2018

You are trying to determine the age of a lava flow using an isotope with a half-life of 1.5 million years. If the sample has gone through four half-lives, what is the age of the rock?

A) 1.5 million years
B) 6 million years
C) 375,000 years
D) 5 billion years

Question 2

For what reason might the nuclei of atoms break apart in radioactivity?

A) There are too many neutrons in the nucleus.
B) Electrons are being shared by two adjacent atoms.
C) Forces that bind protons and neutrons together are weak.
D) Protons are being exchanged between atoms.