Author Question: Which event does not occur during the decay of potassium-40 isotopes? A) An electron orbiting ... (Read 55 times)

lidoalex · **on:** Jul 16, 2018

Which event does not occur during the decay of potassium-40 isotopes?

A) An electron orbiting near the nucleus enters into the nucleus and combines with a proton to produce a neutron.
B) Electrons rearrange, producing x-rays.
C) A neutron changes to a proton and emits an electron.
D) A proton is ejected from the nucleus.

Question 2

Where have the oldest dated sand grains been found on Earth?

A) Australia
B) Canada
C) The United States
D) Africa