All of the alkali earth metals, group 2, have two valence electrons. which of these would represent the oxidation number of the alkali earth metals such as magnesium and calcium?

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.

If a solution had a ph of 7 what is the solution

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal