Fusion of hydrogen isotopes Which of the following best describ rence between nuc Fission means splitting atoms while fu.......mans combining atoms. Fusion means splitting atoms while fission in eans combining atoms. Only nuclear fission produces energy. Only nuclear fusion produces energy. The Radium Girls suffered damage to many parts of their bodies , especially thei Calcium D Zinc Oxygen Iron

### Question 1: **Fusion of hydrogen isotopes**<br />Which of the following best describes the difference between nuclear fission and fusion?<br /><br />**Correct Answer:** <br />**Fission means splitting atoms while fusion means combining atoms.**<br /><br />**Explanation:** <br />- **Nuclear fission** is the process in which a heavy nucleus splits into smaller nuclei, releasing energy. This is commonly used in nuclear power plants. <br />- **Nuclear fusion** is the process where two light atomic nuclei (such as hydrogen isotopes) combine to form a heavier nucleus, releasing a tremendous amount of energy. Fusion powers stars like the Sun.<br /><br />---<br /><br />### Question 2: **The Radium Girls suffered damage to many parts of their bodies, especially their...**<br /><br />**Correct Answer:** <br />**Calcium**<br /><br />**Explanation:** <br />The Radium Girls were factory workers in the early 20th century who painted watch dials with radium-based luminous paint. They ingested radium by licking their brushes to keep them sharp. Radium behaves similarly to calcium in the body, so it was absorbed into their bones, causing severe damage such as bone fractures, necrosis, and cancer. Calcium is the primary element affected because radium replaces it in the bone structure.