Answer is: carbon.
<span>During gamma emission the nucleus emits radiation without
changing its composition, if for example have nucleus with six
protons and six neutrons (carbon atom) and after gamma decay there
is nucleus with six protons and six neutrons.
Gamma rays are the electromagnetic waves with
the shortest wavelengths (1 pm), highest frequencies (300 EHz) and
highest energy (1,24 MeV).</span>
The correct answer would be D: Physical properties can be observed without changing the identity of a substance
C because it’s talking about the earth and it’s rotating
DO STUFF!!! XD but really you would record there heartbeat per minute and record there normal rate and the rate watching sports!
