Formulas

Question 1

Atomic Mass

Answer 1

[(% A) / 100 ] (Mass of Isotope A) + [(% B) / 100 ] (Mass of Isotope B) + …

Question 2

Heisenberg’s Uncertainty Principle

Answer 2

Δx * Δ(mv) ≥ h/(4π),
Δx = Uncertainty of Position
Δ(mv) = Uncertainty of Momentum
h = Planck’s Constant

Question 3

Effective Nuclear Charge

Answer 3

Zₑff = z - s,
z = Atomic Number
s = Screening Constant ~ Number of inner electrons