Which statement is true of the energy levels of electrons in shells? electrons must lose energy to move from the first to the second shell. the valence shell has higher energy than other occupied shells. all the electrons in an atom have similar amounts of energy. all of the above. none of the above.

The valence shell has higher energy than other occupied shells

Explanation:

According to Bohr's model of the atom, he suggested that the extranuclear part consists of electrons in specific spherical orbits around the nucleus.

His model suggests that the electron can move round the  nucleus in certain permissible orbits or energy levels. The ground state is the lowest energy state available to the electron. The excited state is any level higher than the ground state.

The valence electrons are in the outermost shell of an atom. These electrons are of the highest energy levels in the atom

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.