In the periodic table, which is described by the statement: each element has one more outer electron than the element before it?
a. a period
b. a family
c. a group
d. a vertical row

Compare and contrast physical changes with chemical changes.

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.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2