A student wants to heat a piece of iron so that its temperature rises by 20 degrees C. What information does she need about the iron to plan the experiment? A.)Temperature. B.) Mass. C.) Conductivity. D.) Surface area.

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

What is the lowest number energy level where a d sublevel is found

What type of reaction fuels the processes seen here?