In a short paragraph, explain the difference between precision and accuracy. Accuaracy describes how close measurements are to a known or actual value.
Poor accuracy indicates that the same mistake was made in each measurement.
This is called systematic error. Precision is related to random error which causes random variation in the measurements made. In our laboratory, we often think that good precision indicates good accuracy. This is only true if there are no systematic error in the measurement procedures we use. Note that this table includes ions as well as atoms.