In the Beginning

¨ Who came up with the term ‘atom’?

Democritus

¨ Who was Democritus? Include full name, time, profession, other interesting personal information.

¨ What was the main difference between Democritus and “the others” that came after him?

Dalton

¨ Who was Dalton? Include full name, time, profession, other interesting personal information.

¨ What was Dalton’s atomic theory?

¨ What was his atomic model?

¨ What did he say about compounds and chemical reactions?

¨ What was the problem or issues with this model?

Thomson

¨ Who was Thomson? Include full name, time, profession, other interesting personal information.

¨ What was Thomson’s model?

¨ What is the special name of his model?

¨ Which subatomic particles does his model have?

¨ What was the problem or issues with this model?

Rutherford

¨ Who was Rutherford? Include full name, time, profession, other interesting personal information.

¨ What was his model?

¨ What led him to make his theory?

¨ What experiment did he do and why was he so astonished?

¨ What was significant about his discovery?

¨ Which subatomic particles does his model have?

¨ Who discovered the proton?

¨ What was the problem or issues with this model?

Bohr

¨ Who was Bohr? Include full name, time, profession, other interesting personal information.

¨ What was his model?

¨ How did he explain the main problem with the Rutherford model?

¨ How were the energy levels described?

¨ What does quantized mean?

¨ What is an orbit?

¨ Can electrons move from energy level to energy level?

¨ What was the problem or issues with this model?

Schrödinger

¨ Who was Schrödinger? Include full name, time, profession, other interesting personal information.

¨ What was his model?

¨ How does this model describe the atom?

¨ Why is it better than the Bohr model?

¨ What is an orbital and how is it different than an orbit?

Summary Questions:

1. How were the atomic models developed when no one had seen the atom?

2. What flaws exist in Dalton's, Thomson's, Rutherford's and Bohr's model of the atom?Do any flaws exist in the modern quantum model of the atom? Explain.

3. Which of Dalton's principles were contradicted by the work of J.J.Thomson? Do any of Dalton's principles still hold true completely today? If so, which ones hold true?

4. Describe Rutherford's model of the atom. Why was he so amazed by the results of his experiment? What flaws exist in his model?

It turns out that this quantum mechanical view of the atom is our best theory to date on how atoms work. The quantum mechanical model does a much better job in describing and predicting how atoms behave than the planetary/orbit model does.

TEST YOUR LOGIC-------

In these sentences, a word of four letters is hidden at the end of one wordand the beginning of the next word.
Find the pair of words that contains the hidden word and mark it on the answer sheet.

Example

The film ended happily after all.

Answer

film ended ( The hidden word is mend.)

Question 1

She is our team's best player.

A She is
B is our *
C our team's
D team's best
E best player.


Question 2

I'll be home at four o'clock.

A I'll be
B be home
C home at *
D at four
E four o'clock.


Question 3

There is some risk in flying.

A There is
B is some
C some risk
D risk in *
E in flying.


Question 4

Coat the wall with emulsion paint.

A Coat the
B the wall
C wall with
D with emulsion *
E emulsion paint.


Question 5

Can I pay my fee later?

A Can I
B I pay
C pay my
D my fee
E fee later? *


Question 6

Can you jump over your gate?

A Can you
B you jump
C jump over
D over your *
E your gate?

DISCOVER WHY??????

The most difficult phase of life is not when no one understands you but it is when you don’t understand yourself, People could never understand me I don’t understand them either. Never did never will, hence, there are two great days in a person’s life—the day we are born & the day we discover why?

1. Law of the Telephone: When you dial a wrong number, you never get an engaged one.
2. Law of Mechanical Repair: after your hands become coated with grease, yr nose will begin to itch.
3. Law of the Workshop: Any tool, when dropped, will roll to the least accessible corner.
4. Bath Theorem: When the body is immersed in water, the telephone rings.
5. Law of Result: When you try to prove to someone that a machine won't work, it will!
6. Law of Bio mechanics: The severity of the itch is inversely proportional to the reach.
7. Theater Rules: People with the seats at the furthest from the aisle arrive last.
8. Law of queue: If you change queues, the one you have left will start to move faster than the one you are in now.
9. Law of Encounters: The probability of meeting someone you know increases when you are with someone you don't want to be seen with.
10. Law of Coffee: As soon as you sit down for a cup of hot coffee, your boss will ask you to do something which will last until the coffee is cold.

All through the country, everywhere people knew me.
I was very famous, very well loved and respected.
I sang lullabies to the world and soothed lives.
Reducing people’s sorrow and curing their mental fever.

Many women and men became acquainted with me.
Giving me their love, friendship and thoughts.
I made a slip, adoring and forgetting myself.
Toying with many loves and letting my heart take wings.

Then all of a sudden I thought of someone.
I loved extremely, who used to always wait for me.
With as ever, only her dogs and cats as friends!
Oh! Her tears must be flowing as he waited sadly for me!

Darling I’m home! I cried out repeatedly back at home.
And as I called out for her, my heart began to quiver.
I failed to see even her shadow.
And my knees went weak as I read her note.
Good-bye, a famous man!