Answer:
A. Engineers come up with scientific questions when they are developing their design, and scientists do research to answer them.
Answer:
Nocturnal animals, such as owls, tend to have wide pupils and several rod cells in their retina because wide pupil allow more light to enter the eyes and the rods cells in the retina are sensitive to dim light and are vital for night vision.
It was due to the metal foil in which the alpha particles can't even pass through. This experiment conducted by Rutherford led to the discovery of protons.
What is the element with 7 protons? They probably also have 7 neutrons. Just a ball park figure guess.