Please help me I will give you the brain thing and extra points.

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Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.