Lab 8 Quiz Molecular Model Lab (5 points) Name ________________________________________ You are expected to know and follow the Academic Honesty Policy and the Code of Conduct given in the Student Handbook. It is a violation to tell anyone the contents of this quiz. Please answer the following questions. You must show your work to receive credit. A correct answer with no supporting work will earn zero points. 1.The chemical formula of methane is CH4. The Lewis Structure of methane isshown below. Explain how a chemical formula differs from a Lewis structure. (2 points) 2.Draw a Lewis structure for the following molecules. Include the total number ofvalence electrons for each molecule. Show all your work. (3 points) a.PH3 b.CS2

A chemical formula merely shows the actual number of atoms of each element present in a compound. The Lewis structure of a compound shows the number and arrangement of valence electrons on each atom in the compound.

Lewis structures show both lone pairs and bond pairs of electrons on the valence shells of the combining atoms in a compound as dots. This is why it may also be referred to as dot structure or dot electron structure.

The Lewis structures of PH3 and CS2 are shown the image attached to this answer. The total number of valence electrons in PH3 is 8 valence electrons and the total number of valence electrons in CS2 is 16 valence electrons.