Define physical change and chemical change and give examples of each type of change

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20