Fructose and galactose both have six carbon atoms, twelve hydrogen atoms and six oxygen atoms, just like glucose. a friend of yours says: "since those sugars have the same number of atoms, they should have the same name." you "while they do have the same number and type of atoms

Answer is: they are named differently because they are alternate forms (isomers) of the monosaccharide, glucose.

An isomer of a molecule has the same number of atoms of each element (in this example, glucose, galactose and fructose have molecular formula C₆H₁₂O₆), but has a different arrangement of the atoms.

Difference between D-glucose and D-galactose  is the orientation of the hydroxyl group (OH) at fourth carbon atom, at D-glucose -OH group is right and at D-galactose is left.

Difference between D-fructose and D-glucose is that first one is ketonic monosaccharide and second one is aldose (carbonyl group on the endmost carbon atom).

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.