Module 5.4 Lewis Structure

Question 1

Lewis Structure

Quick way to find outer shell

Answer 1

The outer shell is always equal to the group number

Question 2

Lewis Structure

SO₂

Answer 2

If an atom has more than one they go on the outside, the single atom goes in the middle

O S O

Looking at periodic table group numbers S & O are both in group 6, So S & O both have an outer shell of 6 electrons

Rule: every atom has to have 8 electrons around it exept for Hydrogen (only needs 2)

The atom in the middle give the necessary electrons to the outer electrons to make 8
(good notes)

Rule 2: the electrons in the center atoms has to be an even number so both O can give one electron each to give S the 8 it needs so one O will give 1 electron to S (good notes)