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.
Answer: D
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________ is the most abundant of the variable gases in the atmosphere
Fill in the blank(s) with the appropriate word(s).
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Fill in the blank(s) with correct word