1&2&3 pls

Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of these is a p-block element? a. potassium b. argon c. cesium d. hydrogen 2. Which imaging technique requires quantum analysis? a. X-ray b. MRI c. CT scan d. CAT scan 3. What is true about nanotechnology? a. Nanoparticles are too big to present significant health risks to humans. b. Nanotechnology has led to the possibility of baseball-sized machines. c. The effects of quantum mechanics are very important at this scale. d. None of the above