Platinum-175 emits a beta particle Which isotope is produced? 

Is the isotope stable or unstable?

gadolinium-149 emits a beta particle

Which isotope is produced? 

Is the isotope stable or unstable?

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer