Answer:
Alpha decay is a type of radioactive disintegration in which unstable atomic nucleus releases a helium nucleus or alpha particle and transform into a different element. The new element formed will be reduced by four and the atomic number will be reduced by two.
Example of alpha decay is: Uranium 238 transform into Thorium 234 with the emission of an alpha particle.
2-7 days, but depends on the procedure
They didnt have a powerfull enough microscope to see them an when they could they were moving to fast unless they were cold
It’s c had this problem last week
Chemicals dissolved in water. Calcite is a good example, if I'm not mistaken.
