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Answer:
A synthetic element is one of 24 chemical elements that do not occur naturally on Earth: they have been created by human manipulation of fundamental particles in a nuclear reactor, a particle accelerator, or the explosion of an atomic bomb; thus, they are called "synthetic", "artificial", or "man-made".
Explanation: hope that helps
Answer:
14 is the 1 st one and the 15 is 3
<span>the process or action by which one thing absorbs or is absorbed by another.</span>
Water that is returned to the environment after secondary treatment is known as effluent
