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64831
Atoms and Reactions
Description
Chem- F321 (Module 1- Atoms and Reactions) Mind Map on Atoms and Reactions, created by janeva on 01/05/2013.
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chem- f321
module 1- atoms and reactions
chem- f321
module 1- atoms and reactions
Mind Map by
janeva
, updated more than 1 year ago
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Created by
janeva
over 11 years ago
58
2
1
Resource summary
Atoms and Reactions
Atomic Structure
Proton
Mass=1.0
Charge= 1+
Neutron
Mass= 1/2000
Charge=0
Electron
Mass= 1.0
Charge= 1-
Definitions
Annotations:
Mass num,ber is thenumber of particles in thenucleus
Atomic number is the number of proton in the nuclus of an atom
Isotopes are atons of the same element with different numbers of neutrons
An ion is a positively or negatively charges atom or group of atoms
Atomic masses
Definitions
Annotations:
Relative formula mass is the weighter mean mass of a formula unit compared with 1/12 of the mass of an atom of carbon-12
Relativs atomic mass is the weighter mean mass of an atom of an element compared with 1/12 if the mass of an atom of carbon-12
Relative iotopic mass is the mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12
Relative molecular mass is thr weighter mean mass of a molecule compared with 1/12the mass of an atom of carbon-12
Relative atomic mass
Ar(Br)= [(53x79)+(47x81)]/100=79.94
Amount of Substance and Mole
Definitions
Annotations:
Amount of substance is the quantity whose unit is the mole. (Counting atoms)
The Avogadro constant is the number of aoms per mole of the carbon-12 isotope
A mole is the amount of any substance containing as many particles as there are carbon atoms in exacly 12g of carbon-12 isotope
Molar mass is the mass per mole of a substance. The units of molar mass are gmol-1
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