The conversion of one element into another by aritificial means is termed `………………………..`.

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept**: The question asks about the conversion of one element into another through artificial means. This process is a key concept in nuclear chemistry.

2. **Identifying the Term**: The specific term used to describe this process is "artificial transmutation." This term refers to the change of one element into another due to human intervention, typically involving nuclear reactions.

3. **Historical Context**: The concept of artificial transmutation was discovered by Ernest Rutherford. He conducted experiments that demonstrated this process, notably by fusing nitrogen nuclei with alpha particles (helium nuclei).

4. **Example of Artificial Transmutation**: An example of artificial transmutation is the reaction where a nitrogen nucleus interacts with an alpha particle, resulting in the formation of an oxygen isotope and the release of a proton. This illustrates how one element can be transformed into another through artificial means.

5. **Conclusion**: Therefore, the answer to the question is that the conversion of one element into another by artificial means is termed "artificial transmutation."

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