What happens to the electrons in the outer shell as you move across a period

How to convert a density of 0.791g/cm3 to lb/ft3

The excretory system,need answers for all: )

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.