The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday –...
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Transcript of The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday –...
![Page 1: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/1.jpg)
The Periodic Table
Mr. Fox Science Class
![Page 2: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/2.jpg)
Looking for the Pattern
• Remember back to Friday– Valence Electrons– Dot Models of Elements– What do you see when you set up the elements
like they are on the table?
![Page 3: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/3.jpg)
Dmitri Mendeleev
• Russian Scientist in 1869 found a pattern in the elements himself.
• Evidence of the Patterns– Similar chemical and physical properties– Atomic mass – Bonding power (dot models)
Atomic mass – average mass of one atom of an element.
![Page 4: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/4.jpg)
He noticed that patterns appear when the elements were arranged in order of increasing atomic mass.
![Page 5: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/5.jpg)
![Page 6: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/6.jpg)
Periodic Table Today
![Page 7: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/7.jpg)
How to read the table
![Page 8: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/8.jpg)
The stuff
• Chemical Symbol – the one or two letters that stand for an element. Ex: Fe = iron K = potassium
• Atomic Number – number of protons in a nucleus of an atom
• Atomic Mass • Element’s Name
![Page 9: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/9.jpg)
Other things you might see.
• Ion charges • Bonding power• Chemical activity• Size of atom
![Page 10: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/10.jpg)
Organization of Table
• Group – (AKA families)• They are shown in columns on the periodic
table• Each of the elements have similar chemical
properties• Ex: group 18 elements do not react with other
chemicals normally.
![Page 11: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/11.jpg)
Organization of Table
• Period• Horizontal rows across the table• Properties change as you move along a period.• They are predictable• Ex: as you move from the left to the right, the
elements get less reactive. The atoms get larger.
![Page 12: The Periodic Table Mr. Fox Science Class. Looking for the Pattern Remember back to Friday – Valence Electrons – Dot Models of Elements – What do you see.](https://reader036.fdocuments.us/reader036/viewer/2022082613/5697bf931a28abf838c8fdcd/html5/thumbnails/12.jpg)
Valence Electrons
• Each group of the periodic has the same number of valence.
• Dot Models showed this to scientists• The real pattern that comes out