Identify the step that is not part of the scientific method.

conduct an experiment
form a hypothesis
draw a conclusion
state the cause

State the cause is not part of the scientific method.
the scientific method is as follows:
1) form a hypothesis 
2)perform an experiment to test hypothesis 
3)draw conclusions from experiment

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.