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Beginning (5 minutes ). Pick up Atomic Theory/Atomic Mass and Number Worksheet I would like you like to start reviewing the atomic theory quietly. Test Return (15 minutes ). Put your phone away Come and get your test QUIETLY when you heard your name

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Beginning 5 minutes

Beginning (5 minutes)

Pick up Atomic Theory/Atomic Mass and Number Worksheet

I would like you like to start reviewing the atomic theory quietly


Test return 15 minutes

Test Return (15 minutes)

Put your phone away

Come and get your test QUIETLY when you heard your name

You are allowed to discuss your test with your neighbors QUIETLY


Chem 11 atomic theory and atomic mass mass and number

CHEM 11 Atomic Theory and Atomic mass mass and number

February 28th 2014


Announcement

Announcement

  • Office Hour: Day 2 Lunch A204

  • Course Schedule:

  • Feb 28th Atomic Theory, Atomic number, Atomic Mass

  • March 4th: Isotopes- What about the pennies?

  • March 6th: Electronic Structure and Electronic Configuration


My expectation on work habit in this classroom

My expectation on work habit in this classroom

  • Beginning of the class

    • Check the board for the task to do for the first five minute of the class and do it

    • Hand in or open your homework depending on previous class so that Mr. Liang can check it without asking you

  • End of the class

    • Quietly sit back to your seat and wait for Mr. Liang’s wrap-up announcement. This might include the reminder for homework

    • Before you leave the room, check the board for the assignment


Ancient greek periodic table

Ancient Greek Periodic Table

  • Aristolte’s theory of matter

Air

Water

Moist

Hot

Cold

Fire

Earth

Dry


Dalton atomic theory

Dalton Atomic Theory

  • 1. each element is made of tiny particles called atoms

  • 2. The atoms of a given element are identical. The atoms of different element are different.

  • 3. Chemical compound are formed when atoms are combined with each other

  • 4. Chemical reaction involve reorganization of the atoms


Implication of dalton atomic theory

Implication of Dalton Atomic Theory

  • Law of definite proportions: every pure sample of particular compound always contains the same proportion by mass of the element in the compound. (i.e. H2O)

  • Law of conservation of mass: the mass of reactants equal to the mass of products.


Thompson model plum pudding

Thompson Model (Plum Pudding)

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Rutherford gold experiment

Rutherford Gold Experiment

  • Rutherford discovered alpha (α), beta (β), and gamma (Υ) particles

  • Alpha particle is He2+

  • Rutherford discovered densely packed centre of positive charge which he called nucleus

  • Predicted the existence of neutron

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Niels bohr bohr rutherford model

Niels Bohr- Bohr-Rutherford Model

  • Developed an explanation of atomic structure that underlines regularities of periodic table of element. His atomic model had atom built up of successive orbital shells of electrons

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