Unit EQ: Atomic History?
EQ: What is the atom made of?
Warm-up 1) What type of element is Silicon,
Zinc, Phosphorus, Barium?
2) How many protons, neutrons and electrons
does Bromine 79 and Bromine 80 have?
Dr. Pariyadath is in the house!!!
Unit EQ: How is Periodic Table arranged?
Warm-up
1)
2)
What is group 2 called?
Group 3-12?
3) What temp. does water boil? freeze?
4) What 4 things did Dalton say? Which incorrect
and why?
Test Friday
Unit EQ:How is periodic table arranged?
Subatomic particles?
Warm-up 10/7/13
 How many protons, neutrons and electrons
does Carbon 12 and Carbon 14 have?
Complete problems p116 #21-22
 P117 #23-24 p 122 #35-56 p123 #65
 All due on Thursday and Quiz Thursday

Atomic Theory
Democritus 400BC– Indivisible and indestructible
Dalton 1803– 1. Indivisible (wrong because fission –
splitting atoms and subatomic particles)
2. Atoms same element identical- (wrong b/c
Isotopes – atoms same element different mass)
3.combine in simple whole number ratios
4. React by combining, separating and
rearranging
Goldstein 1886 - proton
Thomson 1897- cathode ray tube- discovered
electrons – Plum pudding model
Atomic Theory Cont.
Rutherford 1911– Gold foil experiment
Discovered the nucleus and most of atom is empty
space
Bohr 1913– electrons occupy fixed orbits around
nucleus and can jump up or down by gaining or
losing energy
Millikan 1916 – found the quantity of charge of
electron and its mass 1/1840 of hydrogen atom
Chadwick 1932– neutron
Current model derived with crazy Math
Quantum Mechanical Model (Schrodinger)
also electron cloud model - dense central
nucleus surrounded by electrons in orbitalsareas of high probability to find electron
Heisenberg uncertainty Principle- can not tell
the position and velocity of an electron
simultaneously
The atom
Subatomic
particles
Location
Mass
charge
symbol
proton
nucleus
1 AMU
positive
p+ H+
atomic mass unit
neutron
nucleus
1 AMU
neutral
n
electron
in cloud
around
nucleus
1/1840
AMU
negative
e-
Probability of finding blade in blurry region

Same idea of
finding electrons
around nucleus
Unit EQ:How is periodic table arranged?
Subatomic particles?
Warm-up
 How many protons, neutrons and electrons
does Carbon 12 and Carbon 14 have?
Read and take notes on chapter 4 and section
6.1
Properties of Metals,Non-metals and
metalloids
List as many properties of each as you can.
Metal
metalloid
Non-metal

ductile
properties in between
malleable
semi-conductor
shiny
good conductors

What is a Bohr model?
dull
brittle
poor conductors
insulators
Some Notes for you. You’re welcome
orbit- fixed path of electron proposed by Bohr
atomic orbital – region in space where there is
a high probability to find electron
quantum of energy- amount of energy to move efrom one energy level to another
principal energy level n=1,2,3,4, and so on
ductile – drawn into thin wires
malleable- hammered into thin sheets
Unit EQ: How is Periodic Table arranged?
EQ: What is percent abundance/composition?
Warm-up
1) What is percent abundance?
Individual X100
Total

What is the law of conservation of mass?
Why is it so important?
Unit EQ: How is Periodic Table arranged?
EQ: What is percent abundance/composition?
Warm-up
1) What is the atomic mass of isotopes of
carbon-12 and carbon 13 if percent
abundance is 98.9 and 1.10, respectively.
2)
2 isotopes of bromine have masses of 79
and 80, the atomic mass of bromine is
79.9, what is the percent abundance of
each?
Unit EQ: How is Periodic Table arranged?
EQ: What is percent abundance/composition?
Warm-up
1) What is the atomic mass of isotopes of
oxygen-16, oxygen -17, oxygen –18 . The
relative abundances are O-16 (99.759%),
O-17 (0.037%), O-18 (0.204%)
Unit EQ: How is Periodic Table arranged?
EQ: What is percent abundance/composition?
Warm-up 10/3/11
1) What is the noble gas notation of
Chlorine?
2) What is the noble gas notation of
Strontium?
-
Unit EQ: How is Periodic Table arranged?
EQ: What is percent abundance/composition?
Warm-up 10/8/13
1) What is the atomic mass of isotopes of sulfur-32,
sulfur-33, sulfur –34 and sulfur – 36. The
relative abundances are S-32 95.022%, S-33
0.76%, S-34 4.22% and S-36 0.014%.
2)
2 isotopes of chlorine have masses of 35 and 37,
the atomic mass of chlorine is 35.453, what is
the percent abundance of each?
Ticket out the Door 9/26
What is 58oC in Kelvin?
2) How many neutrons does Neptunium-237
have?
3) Germanium (Ge) is what type of element?
4) Element X has 2 isotopes. The first has a
mass of 134 at 45% abundance, second
has mass of 137 at 55%. What is atomic
mass?
5) What is the name of group 17?
6) What element is in group 5 period 6?
1)
Ticket out the Door Redo
1)
2)
3)
4)
5)
What is 37oC in Kelvin?
How many neutrons does Uranium-235
have?
What is the frequency of light with
wavelength 6.7 X 10-7 meters? c= 3.0 X
108m/s
What is electron configuration of Arsenic
(As)?
Draw orbital notation of Oxygen?
Video On History of Atom


Einstein and Bohr fight over atomic theory
Schrodinger and Heisenberg throw down
Ticket out the Door Retake
What is 45oC in Kelvin?
2) What is 256 K in Celsius?
3)What element is in group 7 period 3?
4)Arsenic (As) is what type of element?
5)What is the name of group 18?
1)