public Atom(int protons, int neutrons)
{
Protons = protons;
Neutrons = neutrons;
Element = ElementMap.FromProtonCount(Protons);
Period = PeriodicTable.GetPeriod(Element);
Mass = AtomPropertyCalculator.CalculateMass(Protons, Neutrons);
Radius = PeriodicTable.GetCovalentRadius(Element);
ElectroNegativity = PeriodicTable.ElectroNegativity(Element);
FormalCharge = 0 * PhysicalConstants.ElementaryCharge;
EffectiveCharge = FormalCharge;
}