Answer:
an isotope has the same number of protons but a different number of neutrons than the other atoms of the same element.
Chemicals are never classified all depends upon it's physical and chemical properties so the answer is FALSE
The question is asking to state the conclusion that can be formulated, base on the problem or the given analysis of the data, about the accuracy and precision and base on my research, i would say that the Accuracy is Poor but the Precision is Good. I hope this would help you