Unit EQ: Atomic History? EQ: What is the atom made of?

1
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!!!

2
Unit EQ How is Periodic Table arranged?

• Warm-up
• 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

3
Unit EQHow 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

4
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

5
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

6
Current model derived with crazy Math

• Quantum Mechanical Model (Schrodinger) also
  electron cloud model - dense central nucleus
  surrounded by electrons in orbitals- areas of
  high probability to find electron
• Heisenberg uncertainty Principle- can not tell
  the position and velocity of an electron
  simultaneously

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The atom
Subatomic particles Location Mass charge symbol
proton nucleus 1 AMU positive p H
neutron nucleus 1 AMU neutral n
electron in cloud around nucleus 1/1840 AMU negative e-
atomic mass unit
8
Probability of finding blade in blurry region

• Same idea of finding electrons around nucleus

9
Unit EQHow 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

10
Properties of Metals,Non-metals and metalloids

• List as many properties of each as you can.
• Metal metalloid Non-metal
• What is a Bohr model?

ductile malleable shiny good conductors
dull brittle poor conductors insulators
properties in between semi-conductor
11
Some Notes for you. Youre 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 e-
  from one energy level to another
• principal energy level n1,2,3,4, and so on
• ductile drawn into thin wires
• malleable- hammered into thin sheets

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Unit EQ How is Periodic Table arranged? EQ
What is percent abundance/composition?

• Warm-up
• What is percent abundance?

Individual X100 Total
13

• What is the law of conservation of mass?Why is
  it so important?

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Unit EQ How is Periodic Table arranged? EQ
What is percent abundance/composition?

• Warm-up
• What is the atomic mass of isotopes of carbon-12
  and carbon 13 if percent abundance is 98.9 and
  1.10, respectively.
• 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?

15
Unit EQ How is Periodic Table arranged? EQ
What is percent abundance/composition?

• Warm-up
• 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)

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Unit EQ How is Periodic Table arranged? EQ
What is percent abundance/composition?

• Warm-up 10/3/11
• What is the noble gas notation of Chlorine?
• What is the noble gas notation of Strontium?
• -

17
Unit EQ How is Periodic Table arranged? EQ
What is percent abundance/composition?

• Warm-up 10/8/13
• 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 isotopes of chlorine have masses of 35 and 37,
  the atomic mass of chlorine is 35.453, what is
  the percent abundance of each?

18
Ticket out the Door 9/26

• What is 58oC in Kelvin?
• 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?

19
Ticket out the Door Redo

• 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?

20
Video On History of Atom

• Einstein and Bohr fight over atomic theory
• Schrodinger and Heisenberg throw down

21
Ticket out the Door Retake

• What is 45oC in Kelvin?
• 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?