Answer:
Explanation:
That the first experimenter didn't do something (like wash the glassware) that was critical to the experiment.
That the first experimenter forgot to record an important step.
That the first experimenter didn't do what his instructions implied.
The person was travelling 100 kph (kilometers per hour). Hope this helps :)
Of the same element with different mass numbers are called isotopes 3) Isotopes have the same number of protons but different numbers of neutrons in their nuclei. ... The 63Cu isotope has 63 - 29 = 34 neutrons. The 65Cu isotope has 65 - 29 = 36 neutrons.
