10. The gas inside each balloon takes up the same amount of space. The difference in the mass of the balloons is only a few grams at most. The
balloon resting on the table is filled with air. The floating balloon is filled
with helium gas. Why might the helium balloon float while the other rests
on the table?

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

Order of filling levels and sublevels of electrons: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²3f¹⁴5d¹⁰6p⁶for an element with 5 electrons in the 3d energy level: full configuration: 1s²2s²2p⁶3s²3p³.

Ithink carbon dioxide, i am not completely sure.tell me if i am wrong.