Atoms and Reactions

Description

Chem- F321 (Module 1- Atoms and Reactions) Mind Map on Atoms and Reactions, created by janeva on 01/05/2013.
janeva
Mind Map by janeva, updated more than 1 year ago
janeva
Created by janeva over 11 years ago
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Resource summary

Atoms and Reactions
  1. Atomic Structure
    1. Proton
      1. Mass=1.0
        1. Charge= 1+
        2. Neutron
          1. Mass= 1/2000
            1. Charge=0
            2. Electron
              1. Mass= 1.0
                1. Charge= 1-
                2. 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
                3. Atomic masses
                  1. 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
                    1. Relative atomic mass
                      1. Ar(Br)= [(53x79)+(47x81)]/100=79.94
                    2. Amount of Substance and Mole
                      1. 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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