Al, since it is the only metal in that list
Answer:
one of the atoms sharing electrons is more electronegative than the other atom
Explanation:
Well, according to the law of conservation of mass, the total mass of the reacting atoms must equal the total mass of the final rearranged products produced through the reaction. Assuming that both products are the only products produced, it would constitute the total matter produced, and since each product has a mass of 25 grams each. The total would be 50 grams. Thus the total mass of the reactants also would need to be 50 grams, as no matter is lost in a chemical reaction.
Explanation:
Aldonic Acid:
Aldonic acids are suger acids.
General formula of aldonic acid = 
Aldonic acids are obtained by the oxidation of aldehydic group of suger.
So, aldonic acids have hydroxyl group at one terminal and carboxylic group at another terminal.
Gluconic acid is an example of aldonic acid.
Uronic Acid:
It is also a type of suger acid having carbonyl functional group at one terminal and carboxylic group at other terminal.
It is obtained by oxidation of hydroxyl group of the sugar.
Aldaric Acid:
Aldaric acid is also a type of sugar acid having carboxylic acid functional group at both the ends.
Both the hydroxyl group and aldehydic group are oxidized to form class of compound, called aldaric acid.