This presentation is the property of its rightful owner.
1 / 14

# Pgs. PowerPoint PPT Presentation

Chapter 4: The Periodic Table. Pgs. Pgs. 114 – 155 in your book. Happy Monday! Welcome back!. YOU NEED YOUR BOOKS TODAY – GO GET THEM NOW !! Packet O Fun – p1, intro activity – work with the people around you. Read pgs. 116-118 in book Complete p2 in P of F Notes.

Pgs.

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

#### Presentation Transcript

Chapter 4: The Periodic Table

Pgs.

Pgs. 114 – 155 in your book

### Happy Monday! Welcome back!

• YOU NEED YOUR BOOKS TODAY – GO GET THEM NOW!!

• Packet O Fun – p1, intro activity – work with the people around you.

• Read pgs. 116-118 in book

• Complete p2 in P of F

• Notes

### History of the Periodic Table

• In this chapter we are studying the periodic table.

• As you read, the credit for the modern periodic table goes to Dmitri Mendeleev.

• Mendeleev recognized that there were repeating patterns in the periodic table and he organized the table around this periodicity.

### John Newlands 1865: English Chemist

• Arranged the known elements according to

• Physical and chemical properties &

• in order of increasing atomic mass

• Law of Octaves/ Rule of Eight

• All elements in a given row had similar properties and this pattern repeated every eight elements

### Dmitri Mendeleev 1869: Russian Chemist

• Invented the first Periodic Table

• Organized the 63 known elements in vertical columns according to their properties

• Two interesting things came from this:

• Gaps

• Elements did not necessarily fit according to atomic mass

### Henry Moseley 1909: English Chemist

• Looked at x-ray spectra

• Spectral lines were correlated to atomic number

• Led to the current organization of the PT according to

• Increasing atomic number

### Tuesday!

• P of F p.4: Valence Electrons / Lewis Dot Structures

• Lab! Periodic Families 

### Periodic Law

• Repeating physical and chemical properties change periodically with their atomic #

• Modern term for Mendeleev’s “chemical periodicity”

• Why does this happen?

• ### Valence Electrons

• Electrons that are found in the outermost shell of an atom and that determine the atom’s chemical properties

• Participate in reactions with other atoms

• The s and p electrons at the highest energy level

### Valence Electron Practice

• Practice determining the number of valence electrons using p.4 in your Packet O Fun!!

• CW/HW: p5&6 – Valence electrons & Lewis Dot Structures

### Lab: Periodic Table Families Lab

• Lets go to the lab!!

• What do we notice is going on??