We're the Grade 11s in Mr. Doktor's chemistry 11 class.
We're in Block A, Day 1.
We are
Theresa Nguyen
Dominika Skibicki
Charles Perea
Tim Pang
This is our blog.

Today a project was assigned on the peridic table of elements. Groups were assigned a topic and must present a poster, quiz, and handout. Due date is either monday march 15 or wednesday march 17. Class time was given to start organizing and planning the project with our groups. 03/05/10 - DAY1D
EMISSION SPECTRA
- Each element gives off a specific colour of light
- These are known as Emission spectra
-Unique to each element
-If electrons absorb energy they can be bumped to a higher level
- When they fall to a lower level, they release that energy as light

ATOMIC STRUCTURE
- Atoms are made up of parts called subatomic particles
- Protons (+) and Electrons (-) Neutrons (0)

EX: Particle - PROTON
- Mass (Multiples of proton) 1
- Charge (Elementary Charges) +1
- Location - Nucleus

Particle - NEUTRON
- Mass (Multiples of proton) 1
- Charge (Elementary Charges) 0
Location - Nucleus

Particle - ELECTRON
- Mass (Multiples of proton) 1/1837
- Charge (Elementary Charges) -1
- Location - Outside Nucleus

ISOTOPES
- The # of protons determine the type of element
- Changing the # of neutrons changes the isotope of the element
- All isotopes have the same chemical properties

THE NUCLEI OF THE 3 ISOTOPES OF HYDROGEN
- protium, 1 proton
- Deuterium, 1 proton + 1 neutron
Tritium, 1 proton + 2 neutrons

MASS #
- Mass # = protons + neutrons
** Mass # = Atomic # + # Neutrons
** A = Z + N
- "A"
- Different Isotops have different masses

EX: 7/3 Li
3 Protons, 4 Neutrons

WATCH THIS VIDEO! 03/03/10 - DAY1C

Bohr Models

• Atoms are electrically neutral


• Two different models can be used to describe electron
  configuration


• Energy Level Model


• Bohr Model

• Electrons occupy or orbits


• 2 electrons in the first orbital


• 8 electrons in the second orbital


• 8 electrons in the third orbital


• "Octets" - levels

EX:

energy level model -

• 8e


• 8e


• 2e


• 35/17 Cl

Bohr Model

Hybridized Orbitals

• The first of the Bohr leves is the 1st orbitals and it holes 2 electrons
• The second level contains the 3 electrons, 2px, 2p2, 2p3 orbitals they combine (hybridize_ to form one 2sp3 orbital
  

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