Bohr Model powerpoint.pptx

7/27/2019 Bohr Model powerpoint.pptx

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The Bohr ModelNot so Bohring!9/23/13


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Warm Up (3 min)

Grab a copy of the guided notes and glue

them in to your journal sideways like this!

We will fold them inDO NOT TRIM YOUR

NOTES!

15

16


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Interesting Article

http://dailym.ai/16xxci6
https://webmail.duvalschools.org/owa/redir.aspx?C=qfL2Ii8T2EmFKCa5fAyEABNYfFaxjdAIJlzDsviPkngTCo8lIu2ZVJ2bm4IgdpdD-Z-pdPGOIzo.&URL=http://dailym.ai/16xxci6https://webmail.duvalschools.org/owa/redir.aspx?C=qfL2Ii8T2EmFKCa5fAyEABNYfFaxjdAIJlzDsviPkngTCo8lIu2ZVJ2bm4IgdpdD-Z-pdPGOIzo.&URL=http://dailym.ai/16xxci6


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Have you ever wondered?


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7/21

The Bohr Model: A Closer Look!

The energy level an electron normally occupies is called its

ground state. But it can move to a higher-energy, by

absorbing energy. This higher-energy, less-stable state is

called the electrons excited state.

http://www.youtube.com/watch?v=vJmcWjH_kPc
http://www.youtube.com/watch?v=vJmcWjH_kPchttp://www.youtube.com/watch?v=vJmcWjH_kPchttp://www.youtube.com/watch?v=vJmcWjH_kPc


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The Bohr Model: A Closer Look!

Sometimes the energy released by electrons occupies the

portion of the electromagnetic spectrum(the range of

wavelengths of energy) that humans detect as visible light.Slight variations in the amount of the energy are seen as

light of different colors.


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Light Emission Spectra

1st: An electron must become excited

2nd: Once an electron ABSORBS ENERGY it will jump up to a

higher energy level

3rd: However, what goes up must come down. The electron

falls back down to the original energy shell and LIGHT (a

photon) IS PRODUCED!! **ROY G. BIV

Violet is the highest in energy and in frequency (how fast a

wave travels)

Red is the lowest in energy and frequency


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ROY G. BIV


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Steps for creating the Bohr Model

Remember ATOMIC # = # protons = TOTAL electrons

Draw dots on energy levels starting closest to nucleus untilTOTAL # e - reached!

Energy Level Max # of Electrons

1 2

2 8

3 8

Etc.. 8


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Guided Practice

Boron (B)

How many electrons? __________

Draw the nucleus and start dividing electrons among shells. Remember:


1 2

2 8

3 8

Etc.. 8


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Guided Practice

Neon (Ne)


Draw the nucleus and start dividing electrons among shells. Remember:


1 2

2 8

3 8

Etc.. 8


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Guided Practice (2 min)

You try the next two by yourself (Sodium and Nitrogen)!

Ask a table partner if you get stuck.

Follow these steps:


Draw the nucleus and start dividing electrons among shells.


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MEDIA

BOHR MODELhttp://www.youtube.com/watch?v=Ic8OnvRonb0&safe=active

HUMAN BOHR MODEL

http://www.youtube.com/watch?v=PLpZfJ4rGts
http://www.youtube.com/watch?v=Ic8OnvRonb0&safe=activehttp://www.youtube.com/watch?v=PLpZfJ4rGtshttp://www.youtube.com/watch?v=PLpZfJ4rGtshttp://www.youtube.com/watch?v=Ic8OnvRonb0&safe=active


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Group Activity

You have 4 minutes to identify your elements and

record them on the back of your notes.

Talk with the members of your table and identify

any similarities you have in your items.

Answer questions 1-2 as a group. Each person

record your answers on the back of your notes.


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Answers

A: Hydrogen (1)

B: Sodium (11)

C: Lithium (3)

D: Magnesium (12)

E: Helium (2)

F: Beryllium (4)

G: Boron (5)

H: Aluminum (13)

I: Carbon (6)

J: Silicon (14)

K: Nitrogen (7)

L: Phosphorous

(15)

M: Oxygen (8)

N: Sulfur (16)

O: Fluorine (9)

P: Chlorine (17)

Q: Neon (10)

R: Argon (18)


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Discussion Questions

Which scientist proposed this atomic model?

What is incorrect about this atomic model?

What does each row have in common?

What does each column have in common?

Devise a rule that will allow you to determine thenumber of valence electrons for Groups 1-2 and 3-

18 using on only the Periodic Table.


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Independent Practice (10 min)

Complete all independent practice questions on the

left side of your notebook.

You do not need to write the multiple-choice

questionsjust the answers!


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Exit Ticket

When an electron absorbs energy it moves to its

____________ state. However what goes up must come

down, so when it loses energy it goes back to its _________state.

In which shell would an electron have the most energy?

Draw the Bohr Model for Aluminum. Make sure to label eachenergy level.

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Bohr Model powerpoint.pptx