Key equations and relationships Flashcards
1
Q
Relationship between Mass Number (A), Number of Protons (p), and Number of Neutrons (n)
A
A = number of protons (p) + number of neutrons (n)
2
Q
Atomic Mass
A
Atomic mass = Σn(fraction of isotope n) x (mass of isotope n)
3
Q
Relationship between Density (d), Mass (m), and Volume (V)
A
d = m/V
4
Q
Avogadro’s Number
A
1 mol = 6.0221421 x 1023 particles
5
Q
The First-Order Rate Law
A
Rate = kN
6
Q
The Half-Life Equation
A
k = rate constant
t1/2=0.693/k
7
Q
The Integrated Rate Law
A
Nt= number of radioactive nuclei at time t
N0 = initial number of radioactive nuclei
ln (Nt/N0) = -kt
8
Q
Einstein’s Enegery-Mass Equation
A
E = mc2
9
Q
A
10
Q
milli
A
10-3
11
Q
centi
A
10-2
12
Q
deci
A
10-1
13
Q
micro
A
10-6
14
Q
nano
A
10-9
15
Q
pico
A
10-12
