CHEM 101 chapter 2

Red light has a _____ frequency and a ______ wavelength than ultraviolet rays

lower

longer

Which color/frequency of light travels the fastest in a vacuum?

they all have the same speed

Which of the following forms of radiation has the shortest wavelength?

On the spectrum, which kinds of rays have the shortest wavelength?

gamma

Wavelength and _______ have an inversely proportional relationship

frequency

On the spectrum, which rays have the longest wavelength?

radio

What happens to the energy of a photon if the wavelength is doubled?

The energy is halved!

E=hu=hc/ wavelength (upsidedown y)

In the photoelectric effect, if the intensity of light shone on a metal increases, what will happen?

There will be more electrons ejected

In the Bohr model of the hydrogen atom, the energy required to excite an electron from n=2 to n=3 is ______ the energy required to excite an electron from n=3 to n=4?

greater than

As \(n\) increases, the energy levels become _____ (less/more) negative and move closer together.

less

When an electron in an excited energy level drops to a lower energy level, a photon is emitted. If the electron drops to n=1, which transition will emit the longest wavelength for n= ____ to n=1

2

because The energy of the photon equals the difference between the two energy levels.

Delta E = E(higher) - E(lower)