Which is an example of a highly unstable isotope that is often used in fission reactions?

Iwill give extra points to who gets this right

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.