When we draw Bohr diagram for the elements, why calcium has 8 electrons on the third shell but zinc has 18 electrons on the Third shell. Justify your answer by writing the electron configuration and drawing Bohr diagram.

5.Reason from a scientific model. Write out a brief paragraph explaining why we see specific colors when we heat up ionic salts up in a flame. When providing an explanation, make sure to describe the events in the correct order, and specify correctly the cause of a change and the effect of that cause. Describe the Bohr model of the atom and make sure you address the following questions: So a. What is happening to the atoms in the solid salts as they are heated: a) What phase change occurs as you heat the salt? b) Where is the energy coming from for this phase change? b. What is happening to the electrons inside the metal ions to make them generate visible light? 1. Use a Bohr model of an atom to describe the energy changes of the electron required to generate light, starting from the ground state. Why do different atoms produce different colors? All these atoms have the same number of valence electrons, so why do you think their colors are so different? C.

2. Describe the differences and similarities between the Bohr Model and Schrödinger Model. Why are both of these atomic models important?

Draw a Bohr's model of fluorine. How many electron shells does it have? How many valence electrons does it have?