ATOMIC CONCEPT
October 1, 2015
DO NOW– 10/01/2015
You are silent and seated
 In your Notebook, write the Header (Name,
Today Date) and write today AIM (located on
whiteboard) and then answer the following
questions:

◦ Q1: What is excited state?
◦ Q2: Is 2-7-2 ground state or excited state
◦ Q3: Does the number of electrons change when
an atom moves from ground state to excited
state?
REMINDER
QUIZ 4 THIS FRIDAY
 NOTEBOOK CHECK THIS FRIDAY

AIM

The electron configuration for the
element fluorine is both 2-7 and 1-8.
Explain how the movement of
electrons makes the existence of
both electron configurations
possible.
POST LAB 2

The electron configuration for the
element fluorine is both 2-7 and 1-8.
Explain how the movement of electrons
makes the existence of both electron
configurations possible
POST LAB 3

Looking at Groups 1 and 2 on the
Periodic Table, explain the trends you see
in the electron configuration for the
elements belonging to these groups
◦ Periods/electron shells
◦ Valence electrons
◦ Number of electrons vs atomic number
LAB REVIEW
Electron shells
Energy level for each shell
Number of electrons/protons/atomic
number
 Ground state – lower energy
 Excited state – higher energy
 Electron configuration
 Valence electrons
 Absorbed vis emitted
 Color AND bright line spectrum



SUMMARY: TODAY LESSON
HOMEWORK REMINDER
◦ STUDY FOR QUIZ 4