11) Calculate the wavelength of light emitted when each of the following transitions occurs in the hydrogen atom. a) n = 3 -> n=2
b) n = 4 -> n=2
c) n = 2 -> n = 1

12) Using vertical lines indicate the transitions from question 11 on an energy level diagram for the hydrogen atom.

B. speculate about one positive way and one negative way that this boundary has affected the geographical units it separates over time.

For review 1. in terms of which government is sovereign, differentiate among a unitary system, a confed- eral system, and a federal system of government. 2. to which level of government does the constitution distribute the enumerated po implied powers? concurrent powers? reserved powers? provide several power. 3. what matters fall within the scope of state sovereignty? differentiate among dual federalism, cooperative federalism, centralized federalism, and conflicted federalism. how does the national government use grants-in-aid, mandates, and preemption to direct the policy of state and local governments? 6. what do we mean by intergovernmental relations? why is the term a good description of u. s. federalism today? 7. list several advantages and several disadvantages of a federal system.

Arrange the following in order from the shortest wavelength to the longest wavelength. visible light gamma rays radio waves x-ray waves microwave infrared