Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.
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Transcript of Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.
![Page 1: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/1.jpg)
Reading the Periodic Table:Element Squares
![Page 2: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/2.jpg)
Atomic Structure
Nucleus
Electron Cloud
![Page 3: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/3.jpg)
Atomic StructureElectrons
Protons
Neutrons
![Page 4: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/4.jpg)
Protons• In the nucleus• A Positive(+)
charge• Mass = 1 a.m.u• Determine the
element• Determine the
atomic number
![Page 5: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/5.jpg)
Protons
![Page 6: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/6.jpg)
Protons and P. Table
Atomic # = a whole #
Atomic # = # protons
![Page 7: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/7.jpg)
Electrons• In electron cloud• In Unbound atom
are equal in number to protons
• Negatively charged
• Mass=1/1800 amu
e
e
![Page 8: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/8.jpg)
Electrons and P. Table
The atomic # = # protons
Atoms not involved in bondshave the same number ofelectrons as protons.
Atomic # can be used toInfer the number of electrons
![Page 9: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/9.jpg)
Neutrons• In the nucleus• No charge
(neutral)• Mass = 1 a.m.u.• “glue” nucleus
together
![Page 10: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/10.jpg)
Neutrons and P. Table
All the mass of an atomIs found in the nucleus
Only protons and neutronsconsidered to have mass
Calculate # neutrons from Atomic mass
![Page 11: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/11.jpg)
Neutrons and P. TableAtomic mass - Atomic # = # neutrons
1. Round atomic mass to nearest whole number
Ex. # neutrons in helium
Atomic mass = 4.006 =4 Atomic # = 2
4 - 2 = 2 neutrons
![Page 12: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/12.jpg)
Test yourself• Element name?
• Gold• # protons?
• 79• # electrons?
• 79• # neutrons?
• 118
Au196.979
![Page 13: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/13.jpg)
![Page 14: Reading the Periodic Table: Element Squares. Atomic Structure Nucleus Electron Cloud.](https://reader035.fdocuments.us/reader035/viewer/2022081507/5a4d1b127f8b9ab05998ff0c/html5/thumbnails/14.jpg)
FamiliesColumns = Families (or groups)
•Family members share common properties
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Periods• Period = Row
• Row number = # energy levels ( shells)