DecayEquationModel only needs the cellModellArray[ protonNumber ] row instead of the whole cellModelArray

[Luisav1]

From #112.

[zepumph]

I'm not sure that is true, because we link to updates whenever the protonNumber changes. Should we just keep things as is?

build-a-nucleus/js/chart-intro/model/DecayEquationModel.ts

Lines 39 to 40 in 475e3ee

	massNumberProperty.link( () => {
	const currentCell = this.getCurrentCellModel( cellModelArray, protonCountProperty.value, massNumberProperty.value );

[Luisav1]

Yes that makes sense. Things should be kept as is. Thanks @zepumph. Closing.