Students learn the names of different fin types, and that fins are an adaptation that helps fish survive in their habitats. Student Objectives The students will: 1 Observe fish in a classroom aquarium. 2 Describe how fish use their different fins to move forward, up, down, slow down, turn, and stop.elvic fins, located on the bottom of the fish in front of the anal fin, help balance the fish, keep it level, and prevent it from rolling from side to side. Fish sometimes rest by sitting on their pelvic fins.
T here is no oxidation number for compounds, only the elements within compounds. The charge of SO4 (sulfate) is 2-. The oxidation number of each oxygen is 2-.The oxidation number of the sulfur in this compound is 6+.here are four oxygen atoms in each sulfate ion, so t â¦ hat the total charge from oxygen is -8. This means that the oxidation number of sulfur must be +6, so that the total charges will sum to zero, as required for a compound. 3 people found this useful. Rnp 279.
Oxygen in hydroxide has the oxidation number -2. This combines with the oxidation number +1 of hydrogen to form an anion with net charge of -1.he answer is -2. Related Information: The oxidation number of oxygen when it appears as an element is 0. The oxidation number in all compounds but peroxides is -2. The oxid â¦ ation number of oxygen in peroxides is -1.