Explanation:
this may help u follow me and mark as brainlist PlZzzzz
Protons-19 because protons are equal to the atomic number which is 19 , electrons-19 electrons are equal to number of protons, neutrons-20 because the mass number of potassium is 39 so subtract 39 from 19 (atomic number) which gives us 20
Answer:
Every single living thing are comprised of cells. Cells are the fundamental units of structure and capacity in living things. New cells are delivered from existing cells.
This was because the experiment showed that a substance could emit radiation even while it was not exposed to light.
