A chemist analyzes an unknown liquid. The chemist takes samples from the top, middle, and bottom of the samples. Which observation would allow the chemist to reach the conclusion that the liquid could be a pure substance?

A. All three samples have different boiling points.
B. The top and middle samples have the same boiling point, which differs from the boiling point of the bottom sample.
C. All three samples have the same boiling point.
D. The middle and bottom samples have the same boiling point, which differs from the boiling point of the top sample.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

14 days is the half-life of phosphorus-32

58750.08068 is the answer i think