Download The Atom (Chapter 4 and 5)

The Atom (Chapter 4 and 5)
Learning Targets
At this point in time, I could…
Link to Textbook
NOT
partially
…answer the question!
1. Identify and discuss developments in atomic theory
a)
Describe the significance of models in science. Why do
scientists use models and why do the models change
through time?
b)
How has the model of the atom changed through time?
Will it continue to change? (Thomson, Rutherford,
c)
What is the Bohr model of the atom? What are the
advantages and limitations of this model?
d)
What is the modern (aka electron cloud or quantum
mechanical) model of the atom? What are the
advantages and limitations of this model?
e)
Use components of the modern model of the atom to
describe the position of electrons in the atom.
Components include

Heisenberg Uncertainty Principle

Four quantum numbers (principle / energy level,
orbital/sublevel, orientation, spin)

Aufbau principle, the Pauli exclusion principle,
Hund’s rule
Read
Section 4.1 pp 101-103
Section 5.1 pp 127-129
Read
Section 5.1 pp 130-132
Section 5.2 pp 133-136
Read
Section 5.1 pp 130-132
Section 5.2 pp 133-136
Do
Practice Problems 8,9
2. Differentiate among major subatomic particles
a)
How big is an atom? Can we see individual atoms?
Read p 103, 109
b)
What are the three major subatomic particles? What is the
relative charge and mass of each? Where are they
located in the atom?
Read
Section 4.2 pp 104-108
Section 4.3 pp 110-112
c)
Given two or more of the following values, how can you
determine the others:
atomic number, mass number, number of protons,
number of neutrons, number of electrons
Do Practice Problems #
15, 16, 17, 18
d)
Draw a simple Bohr model of an atom of element # 1-20.
e)
Determine the electron configurations of the elements or
identify elements by their electron configuration
Be comfortable with multiple notations: ‘long’, ‘short’ (with
noble gas), ‘fill-in-the-box’ format.
Section 5.1 pp 130-132
Section 5.2 pp 133-136
Do
Practice Problems 8,9
3. Describe isotopes.
a)
What is an isotope?
b)
Why isn’t atomic mass a whole #?
c)
Calculate the average atomic mass of a mixture of
isotopes of an element (given mass and relative
abundance of each isotope)
d)
What evidence led scientists to include the idea of
isotopes in their understanding of the atom?
Section 4.3
pp 110-117
Do Practice Problems #
19,20,21,22,23,24
Lab – Bean Bag Isotopes
completely
&
accurately
4.
Describe the relationship between electromagnetic
radiation and an electron
a)
What is the sequence of different types of electromagnetic
radiation (infrared, ROYGBIV, ultraviolet)?
b)
How do the electrons in atoms produce characteristic
flame test colors and spectra? Use photon in your
response
c)
What is the relationship between wavelength and energy?
d)
Given Plank’s constant, the speed of light, and the
wavelength of light given off by a particular element,
determine the difference in energy between the ground
and excited state. ( ∆ E = hc/wavelength)
e)
What is the difference between continuous and bright line
emission spectra?
f)
Explain how flame tests and spectra provide evidence for
the modern model of the atom.
Date of Self-Assessments
Read
Section 5.3 pp 138-145
Lab: Flame Tests
Lab: Atomic Spectra
Check 1: __________ Check 2: __________ Check 3: _________ Check 4: _________