Which of the following pairs of elements is most likely to form an ionic compound?

a. oxygen and sulfur

b. nitrogen and chlorine

c. nickel and aluminum

d. magnesium and fluorine

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Which of the following are correct values for the ideal gas laws constant r

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness