Chemical elements are chemical species that include a set of atoms having the same atomic number same number of protons in the atomic nucleus. E1 E2. Percent Difference Equations Formulas Calculator Math - Science - Physics - Chemistry - Biology.
When wanting to compare two values that are both determined by experimentation we dont have a correct or accepted value to which to compare so we simply look at how different the two values are as a percentage of their average value.
Note that percent change can be negative or zero. It is expressed in percentage it is the change in new value with respect to the old value. Understand chemical formulas and the different representations of the chemical formula. Ignore a minus sign because neither value is more important so being above or below does not make sense.