Decay and Half Life
Wavelength and Frequency
Units and Sig Figs
Orbitals and Quantum Numbers
Random
100
This type of particle can be represented by He42
Alpha Particle
100
This variable can be described as c=3.00 x 108 m/s
The speed of light
100
The amount of significant figures in 13500
3
100
This orbital number is represented with l
Angular Momentum
100
This process involves splitting a heavy atomic nucleus into 2 smaller nuclei
Fission
200
9843Tc --> 9844Ru + ?
0-1e. (Beta Decay)
200
The type of relationship that wavelength and frequency have
Inverse. As one goes up, the other goes down.
200
The SI unit for the amount of a substance
mole
200
What orbitals are involved in the 2nd principal energy level
2s and 2p
200
An elements mass number consists of this
Protons and neutrons
300
23092U --> 42He + ?
22690Th
300
"b" can be described as
Wavelength
300
0.00033 rounded to one sig fig
0.0003
300
Energy is _____ when electrons drop down to lower orbitals
emitted
300
If an electron is in an excited state, its possible orbit would not include...
n=1
400
Co-60 is good until 70% of its original intensity. Calculate the time until this point. t1/2=5.3years.
k=ln2/5.3=0.13
ln(Nt/N0)=-kt
ln(70/100)=-0.13t
t=2.7yr
400
The frequency of green light with a wavelength of 5.20 × 10^-7 m
ν = (3.00 × 108 m/s) / (5.20 × 10-7 m)
5.77 × 10^14Hz or s^-1
400
The amount of centimeters in 2.3 miles
2.3mi * 5280ft/1mi * 12in/1ft * 2.54cm/1in = 370,000cm
400
The possible values of ml if n=3
-2,-1,0,1,2
400
This equation uses momentum, or mass times velocity, as a variable
De Broglies
Wavelength=Plancks constant/momentum
500
The amount of a radioactive material remaining when its original mass is 4mg, its half life is 3 days, and its been 4 weeks.
Nt=N0(1/2)(t/t^1/2)
Nt=4(1/2)28/3
Nt= 0.006mg
500
This many Joules of energy are contained in a photon with λ = 550 nm.
ν = (3.00 x 108 m s-1) / (550 x 10-9 m)
ν = 5.4545 x 1014 s-1
E = (6.626 x 10-34 J s) (5.4545 x 1014 s-1)
E = 3.614 x 10-19 J
500
Given 7.048 mol CoPO4, this is the amount of grams
7.048mol * 159.3g/1mol CoPO4 = 1085g
500
The wavelength of light emitted when an electron in a hydrogen atom transitions from the n = 3 energy level to the n = 2 energy level.
1/λ = RH * (1/n1² - 1/n2²)
1/λ = 1.097 x 107 m-1 * (1/2² - 1/3²)
1/λ ≈ 1.523 x 106 m-1
λ ≈ 6.56 x 10-7 m
500
The number of neutrons in 16479Au
85