TheadventofX-raytechnologyisintimatelylinkedwiththediscoveryof
radioactivity overall. Discuss this connection and how X-rays for the use of medicine evolved over time. Use concrete nuclear reactions to examplify this
Use citations and a list of references (bibliography)

Use your own words.
As a general rule, have at least one mathematical/numerical calculation or estimate in your essay, as a part of the natural flow of text. Show your calculations. Even simpler estimates should be used to contrast/compare, and should be used when drawing conclusions.
Research question (can also be in the title)
Structure: Introduction, Background sections, Main topic sections, Conclusions.
Proof of personal engagement? (after discussion)