Specifies which of the ions:
K+, Ca2+, I-, Mg2+, N3-, Cl-, are isoelectronics.

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

Which suspect most likely committed the robbery and how do you know

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.