Describe the energy levels in the quantum mechanical model of the atom. How does the spacing change as the energy levels get further from the nucleus?

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

1 a

2 d

3 a

4 c

explanation:

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.