Ends....................?
Answer:
Mg
Explanation:
The element in the third row with two 3s electrons and no 3p electrons is magnesium — Mg.
Out of the following choices, the additional energy required for reactions to occur spontaneously is called the Eact or the Energy of Activation.
Nuclear chemist is most concerned with the study of radioactive isotopes.
<h3>What is radioactive isotopes?</h3>
- A chemical element in an unstable state that emits radiation as it decomposes and becomes more stable.
- Radioisotopes can be created in a lab or in the natural world. They are utilized in imaging studies and therapy in medicine. likewise known as radionuclide.
- For instance, soil and rocks contain naturally occurring radioactive isotopes of the elements Radium, Thorium, and Uranium.
- Water also contains trace levels of uranium and thorium. Air contains radon, which is a byproduct of radium's radioactive disintegration.
- There are 254 stable isotopes, although there are more than 3,000 radioisotopes, only roughly 84 of which are found in nature.
Learn more about radioisotopes here:
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