Why do different substances emit different color light? Which light is most energetic? What does quantized mean?

Why do different substances emit different color light? Which light is most energetic?

What does quantized mean?  What part of an atom is quantized?

What is the octet rule?

How do we measure the strength of a bond?

Using electronegativity, describe the rules for determining the type of bond created between two different elements.
How are covalent and polar bonds similar? How are they different?

What is a dipole moment?  Why is it a vector? How do we symbolize it?

What is a Lewis structure and why do we use it?

What are the basic steps for drawing a Lewis structure for an element?

What are resonance structures?

What does VSEPR stand for?  Why is this important for molecular shape?
Why is it important to draw the Lewis diagram for determining molecular shape?