Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Unpaired electrons

Number of unpaired d electrons on the metal centre.

Compute the spin-only magnetic moment mu = sqrt(n*(n+2)) in Bohr magnetons for n unpaired electrons. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Magnetic moment (μB)

Spin-only magnetic moment.

• Bond, orbital, and structure rules are simplified representations. Resonance, relativistic effects, electron correlation, molecular geometry, oxidation state, and the measurement or computational method affect tabulated and predicted values.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Bond Order Calculator

  Compute molecular orbital bond order as (bonding electrons − antibonding electrons) / 2.

• Collision Frequency Calculator

  Compute collision frequency z = sqrt(2)*pi*d^2*v_bar*n.

• Young Contact Angle

  Calculate the equilibrium contact angle from solid–vapor, solid–liquid, and liquid–vapor interfacial energies using Young's equation. Valid only when the resulting cosine lies between −1 and 1; surface roughness and hysteresis are not modeled.