1.In the text below the names of Henri Becquerel, Pierre and Marie Curie, Ernest Rutherford are mentioned. Recollect what each of them is famous for. The table below will help you to fulfill the task. If possible, add some more facts.
| Henri Becquerel | coined the term radioactivity. |
| created the ionization chamber for detecting and measuring radioactivity. | |
| Marie Curie | identified two types of rays – alpha and beta radiation. |
| determined that once seemingly impenetrable atom was a series of electrons that orbited a nucleus. | |
| Pierre Curie | used fluorescent compounds, namely uranium salt in his experiment. |
| isolated two radioactive elements – radium and polonium. | |
| Ernest Rutherford | discovered that uranium compounds when placed on photographic plates gave off penetrating rays. |
2. Explain the following phenomena:
- radioactive decay,
- radioactivity,
- radiation.
3. The following verbs – make, carry out, conduct, perform, run – can be combined with the noun experiment. Think of sentences in which either of these verbs will be used. Your sentences must contain the true information about experiments made by H. Becquerel, the Curies, E. Rutherford.