Final Exam 5

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A way to measure unknown concentrations of a substance.

shows the radioactive decomposition of an element

A way to measure pH using electrodes

sum of the number of protons and neutrons

atoms with identical atomic numbers but different mass numbers

The point where an indicator starts to change color

A change of 1 pH unit represents a one hundred fold change in the acidity of the solution.

A way to measure pH using a mixture of indicators