Could someone in simple terms explain the definition of physical chemistry?

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.

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?

Which of the following is not true about the atomic model of substances?