Hydrogen's sole electron occupies the 1s orbital but can be excited to the 4p orbital. list all the orbitals this electron might occupy on its way back to its ground state.

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

This drawing shows a human body system. what is the primary function of this body system?

How many moles are in 43.9 l of oxygen