Chapter 3 Flashcards
Speed of Light (c)
2.998x10^8 m/s
Wavelength (λ)
distance between two consecutive peaks or troughs in a wave
Frequency (v)
number of successive wavelengths that pass a given point in a unit of time
Amplitude
one-half the distance between the peaks and troughs
Unit for Frequency
hertz (Hz)
MHz –> Hz
1 –> 10^6
GHz –> Hz
1 –> 10^9
Speed of the Wave
λv
As the wavelength increases, the frequency…
decreases
As the frequency increases, the wavelength…
decreases
Planck’s Number (h)
6.626x10^-34 Js
E=
hv
v=
c/λ
Ground State (of an atom)
occurs when the electron is in the lowest energy orbit (n=1)
Excited State (of an atom)
occurs when it is possible for the electron to move to an orbit with a higher n-value, which has higher energy
An atom absorbs energy and the electron moves…
from a lower n to a higher n
An atom emits energy and the electron moves…
from a lower n to a higher n
Energy of Electron Orbital Movement (equation)
ΔE=k{[1/(n1)^2]-[1/(n2)^2]}
k=
2.179x10^-18 J
Principal Quantum Number or Shell Number
n
Angular Momentum Quantum Number
l
For l=0
s orbital
For l=1
p orbital
For l=2
d orbital
For l=3
f orbital