By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standardized conditions for temperature and pressure, two atoms of the element bind to form dioxygen, a diatomic gas that is colorless, odorless, and tasteless, with the formula O 2.y mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standardized conditions for temperature and pressure, two atoms of the element bind to form dioxygen, a diatomic gas that is colorless, odorless, and tasteless, with the formula O 2.
American Opportunity Tax Credit. Students may claim this credit if you are over age 24 as long as you meet the other requirements, e.g. are not claimed as a dependent on someone else return, are attending a degree program half-time or more, and have not already completed four years of college.
Rating Newest Oldest. Best Answer: Before the American Opportunity credit was the Hope credit. The 4 year limit applies to both the Hope and the American Opportunity. So if you used 3 years of the AOC and 1 year of the Hope credit, you have exhausted your 4 year limit. So yes a 2008 high school grad may well be ineligible for the AOC this year.