Quiz Review - Electromagnetic Radiation, Light, Electrons Flashcards
What is the amplitude of a wave?
The height of the wave from the center.
What is the wavelength of a wave?
The distance of one complete wave cycle (crest to crest, or valley to valley)
What is frequency?
How many times a wave will oscillate in a unit of time.
What is the Speed of light (V)
3E8 m/sec
Formula for energy of a photon:
E=hf
What is Planck’s Constant (h)?
6.626E-34
What equation links the speed of light (V) to wavelength and frequency?
V=λf. (λ=wavelength)(f=frequency)
As frequency goes up, energy goes______
up
What are 3 types of ionizing (dangerous) radiation?
Gamma, X-Ray, Ultraviolet
What are 4 types of non-ionizing (safe) radiation?
Visible, infrared, microwave, radio
Which color of visible light has the lowest amount of energy? The highest amount of energy?
Purple light represents a larger change in energy, and Red light represents the lowest change in energy.
What does the emission spectra of an element tell you about the electrons in atoms of that element?
It tells the change in energy level (or change in the electron shell) of electrons in an atom.
What is the ground state of an electron?
The state at which an electron has the lowest amount of energy.
What is the excited state of an electron?
Any state at which the electron is at a higher energy level than its ground state.
As atomic number goes up, atomic mass___
goes up
What happens to atomic radius as you go down a group?
Atomic radius goes up.
What group of elements have the smallest atomic radius?
Noble Gasses.
What is ionization energy?
The amount of required energy that an isolated, gaseous atom in the ground state must absorb to discharge an electron.
What happens to ionization energy as you move across a period?
It increases
What group has the highest ionization energy? Hint: low atomic radius=high ionization energy.
Noble gasses
What happens to electronegativity as you move across a period and down a group?
Increases across a period and decreases down a group.
Which group has the lowest, and the highest electronegativity?
Group 17 has the highest, 18 has the lowest.
