Chapter 3 Test
Most missed questions
Which is an intensive physical property?
a. color
b. length
c. mass
d. volume
Chapter 3 Test
Most missed questions
Which is an extensive physical property?
a. Color
b. Density
c. length
d. boiling point
Chapter 3 Test
Most missed questions
Helium does not react with any other element.
What type of property is this?
a. Chemical
b. Physical
c. Both chemical and physical
d. None of the above
Chapter 3 Test
Please sit at these stations today
Science Fair
Adopt A Stream
Mini-Projects
Group 1
Group 3
Groups 4 - 7
Science Fair
Adopt A Stream
Mini-Projects
• Peer review your
logbooks (problem,
purpose, variables,
hypothesis)
• Discuss issues with
forms
• Discuss upcoming due
dates
• Discuss issues with
research (4 due next
Monday)
• Discuss AAS guidelines
• Look at things you can be
working on now for your
portfolio
• Review notes for
upcoming training
• Discuss site visit form
requirements
• Discuss timeline
• Discuss upcoming
research
• Discuss issues with
turnitin.com
• Topic assignment
• Begin reviewing topics
Gifted Chemistry – Week 6
Monday
Tuesday
Inquiry Project Chat
Notes: Atomic Theory
Notes & Activity: Atomic Structure,
Atomic Structure WS #1
Scientist Quiz on Wednesday
Wednesday
Scientist Quiz, Atomic Structure WS #2
Thursday
Notes: Isotopes and Percent Abundance
Friday
Half-Life Lab (bring plain M&Ms for this
activity!); Quia Due Sunday 11:59 pm
Atomic Theory
Day 27
Atomic Theory
Democritus
Greek philosopher (460 – 370
BC)
• Matter is not infinitely
divisible
• Matter made of tiny atomos
• Atoms can’t be created,
destroyed or further divided
Atomic Theory
Aristotle
Greek philosopher (384 – 322
BC)
• Rejected ideas of atoms
• Matter is made of earth,
water, fire, and air
Atomic Theory
John Dalton
(1766 – 1844)
• Revived Democritus’s ideas
• Developed atomic theory
based on experiments and
scientific research
• Studied chemical reactions
and was able to determine
mass ratios
Atomic Theory
Dalton’s Atomic Theory
p. 104
Atomic Theory
Scientist
Sir William Crookes
p. 108
J.J. Thomson
pp. 108 - 109
Robert Millikan
p. 109
Ernest Rutherford
p. 111 - 112
Experiment
Led to
discovery of
Atomic Theory
Scientist
Experiment
Led to
discovery of
Used cathode
ray tube to
Particles and
Sir William Crookes
create stream of their negative
p. 108
negatively
charge
charged particles
J.J. Thomson
pp. 108 - 109
Used cathode
ray tubes to
determine mass
was less than
hydrogen atom
Identified 1st
subatomic
particle – the
electron and
the mass to
charge ratio
Atomic Theory
Led to
discovery of
Charge and
mass of the
electron
Scientist
Experiment
Robert Millikan
p. 109
Used oil drops,
X-rays, and
electric fields
Ernest Rutherford
p. 111 - 112
Fired beam of
alpha particles at
gold foil. Alpha Charge and
particles were
mass of the
deflected,
proton
indicating a
nucleus
Atomic Structure
Day 28
Atoms
• Smallest basic unit of matter
• Made of protons, neutrons and
electrons
• Protons and neutrons are in nucleus
• Protons are positive; electrons are
negative
• An element is a particular type of atom
Elements
Elements
Elements
Find the number of
Protons
Neutrons
Electrons
Find the number of
Protons
Neutrons
Electrons
35
17
2Find the number of
Protons
Neutrons
Electrons
39
19
+
Find the number of
Protons
Neutrons
Electrons
Atomic Structure
Day 28
Atomic Theory Quiz
On your device, go to Socrative app or
www.socrative.com
Join room # 588405
Begin Quiz called: Atomic Theory Quiz
p. 118 # 16
Protons and
Electrons
Neutrons
Isotope
10
12
Neon-22
20
26
Calcium-46
8
9
Oxygen-17
26
31
Iron-57
30
34
Zinc-64
80
124
Mercury-204
Symbol
Ne
46
20 Ca
17
8 O
57
26 Fe
64
30 Zn
204
80 Hg
22
10
Atomic Mass Unit
1 amu is approximately equal to the mass of one
proton or one neutron
Atomic mass of an element is the weighted
average mass of the isotopes of that element.
Weighted Averages
Category
Percent
Average
Daily
10%
85
Lab
20%
90
Test
50%
94
Final Exam
20%
82
Total
100%
Points
Weighted Averages
Category
Percent
Average
Points
Daily
10%
85
8.5
Lab
20%
90
18
Test
50%
94
47
Final Exam
20%
82
16.4
Total
100%
89.9
Weighted Averages
Isotope
Percent
Atomic Mass
Chlorine-35
75.78%
34.969 amu
Chlorine-37
24.22%
36.966 amu
Total
100%
Mass
Contribution
Weighted Averages
Isotope
Percent
Atomic Mass
Mass
Contribution
Chlorine-35
75.78%
34.969 amu
26.50 amu
Chlorine-37
24.22%
36.966 amu
8.953 amu
Total
100%
35.453 amu
Weighted Averages
Isotope
Percent
Atomic Mass
Copper-63
69.2%
62.930 amu
Copper-65
30.8 %
64.928 amu
Total
100%
Mass
Contribution