Cobalt. Atomic Number- 27 Atomic Mass-58.933195 26 isotopes Group: Metals.
Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.
-
Upload
charity-hood -
Category
Documents
-
view
250 -
download
5
Transcript of Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.
![Page 1: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/1.jpg)
Chapter 4: Atomic Structure
Subatomic Particles
Symbol Notation
Isotopes
Average Atomic Mass
![Page 2: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/2.jpg)
DemocritusAtom: smallest part of an element that retains the identity of that element.
Democritus (460-370 B.C.): believed in tiny, indivisible, indestructible particles he called “atomos.”
He had NO experimental proof!
![Page 3: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/3.jpg)
John Dalton’s Atomic Theory (1803-1807)
All elements are composed of tiny indivisible particles called atoms.
Atoms of the same element are identical; atoms of different elements are different.
Atoms of different elements can mix in whole number ratios to form compounds.
Chemical reactions cause atoms to separate and recombine, NOT change into different atoms.
![Page 4: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/4.jpg)
Subatomic Particles
![Page 5: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/5.jpg)
Charge Mass (amu)
Location Discoverer
proton
1+ 1 nucleus Thomson
neutron 0 1 nucleus Chadwick
electron 1-
1/1840 outside
nucleusThomson
Comparing Subatomic Particles
The proton gives identity to an atom, the electron gives personality.
![Page 6: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/6.jpg)
Mass Number & Atomic Number
Mass Number = Number of protons + neutrons
Atomic Number = Number of protons
![Page 7: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/7.jpg)
Complete the Table
Symbol Atomic Number
Mass Number
Number of p+
Number of n0
Number of e-
9 10
Na 15
47 25
55 25
S2- 32
Ga3+ 39
![Page 8: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/8.jpg)
Mass of AtomsMass of atom is very small!Heaviest atom is 4 x 10-22g.Diameters of atoms: 100-500 pm (1-5 angstroms)
1 A = 10-10mBoth pm and A are commonly used for diameters.
![Page 9: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/9.jpg)
Isotopes Have the Same…
Number of protons
Atomic Number
Number of electrons
![Page 10: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/10.jpg)
Isotopes Have Different…
Number of neutrons
Mass Number
Mass
n0
![Page 11: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/11.jpg)
![Page 12: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/12.jpg)
Isotopes of Hydrogen
Hydrogen-1 Hydrogen-2 Hydrogen-3
Protium Deuterium Tritium
![Page 13: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/13.jpg)
![Page 14: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/14.jpg)
Atomic Mass Unit (amu)
carbon-12 isotope used as standard 1 atom of carbon-12 = 12 amu carbon-12 has 12 particles with mass mass of proton = 1 amu mass of neutron = 1 amu 12
C 6
![Page 15: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/15.jpg)
Average Atomic Mass
Weighted average of all isotopes
Seen as mass number on periodic table
Units in amu
![Page 16: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/16.jpg)
To Calculate Average Atomic Mass You Need…
Number of Isotopes
Mass of Isotopes
Percent Relative Abundance
![Page 17: Chapter 4: Atomic Structure Subatomic Particles Symbol Notation Isotopes Average Atomic Mass.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649dcf5503460f94ac3286/html5/thumbnails/17.jpg)
Calculating Average Atomic Mass
Mass x Rel. Abundance
Mass x Rel. Abundance
Average Atomic Mass
Isotope A
Isotope B