Answer:
Radiometric dating, often called radioactive dating, is a technique used to determine the age of materials such as rocks.
Thermal energy is the energy of movement.
<em>hey, im jordan :)</em>
the SI unit for the mass of subatomic particles is <u>amu (atomic mass unit)</u>
<em>hope this helps!</em>
<em>have a great day :D</em>
B.Elements
Explanation: they cannot be separated
