The electron
An electron has a charge of
-1
How many sig figs are in the following?
8008
4
What do you call a particle of light?
a photon
What do the following letters stand for?
c
h
c= speed of light
h= Planck's constant
what is the value of plank's constant?
6.626x10-34Jxs
Electrons are responsible for the ____________ properties of an atom.
chemical
How many sig figs are in the following? 000.00820
Your friend is trying to find the energy of a photon. Should he treat light as a wave or a particle?
Wave, he will use the wavelength
Find the wavelength of light with a frequency of 2x1020 Hz.
1.5x10-12 m
What is the speed of light?
3.00x108m/s
When hight energy light hits a sheet of metal, some electrons are ejected. This is called the ________________ __________________.
How many sig figs are in the following?
1.20x103
3
The dual nature of light says that light acts like a __________ and a ______________.
wave, particle
List the 4 equations for this unit.
Energy of a photon= hc/wavelength
speed= wavelength x frequency
Electrons exist in ___________ ______________.
Electrons have some properties of ____________.
waves
How many sig figs are in the following?
100.0
4
Refraction, reflection, and dispersion occur when light acts as a
Find the energy of a photon with a wavelength of 1.2x10-7m.
1.7x10-18 J
The wavelength and color of light released by an atom depends on the ____________ in energy between energy levels.
difference
excited, ground, photons, color
how many significant figures will be in your final answer for the following operation?
100x1928.000
1
The photoelectric effect occurs when light acts as a _______________.
particle
Calculate the change in energy of a a quanta of light with a wavelength of 1.6x10-8 m.
1.2x10-17J
Explain the dual nature of light.
Light can act as a wave or it can act as a particle.