What is the first element to start filling a d sublevel?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what