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Mrs. Knicely. Atoms , Solubility and the Periodic Table. Matter. Anything that has a mass and a volume. Atoms. The building blocks of Matter Consists of Protons (+), Electrons (-), and Neutrons (N ). All atoms of the same element have the same properties. Elements.

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mrs knicely

Mrs. Knicely

Atoms , Solubility and the Periodic Table



  • Anything that has a mass and a volume


  • The building blocks of Matter
  • Consists of Protons (+), Electrons (-),
  • and Neutrons (N).
  • All atoms of the same element have the same properties


  • Consists of only one kind of atom,
  • Cannot be broken down into a simpler type of matter by either physical or chemical means


  • A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound together.
  • In the animation above, two nitrogen atoms
  • (N + N = N2) make one Nitrogen molecule .


  • Atoms of two or more different elements bound together.
  • Can be separated into elements chemically, but not physically.

In the animation above, water (H20) is a compound made of Hydrogen and Oxygen.



  • Solutions are groups of molecules that are mixed up in a completely even distribution.


  • The substance to be dissolved.


  • The one doing the dissolving.

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  • Solubility is the amount of solute that can be dissolved in a specific volume of solvent under certain conditions
    • Depends on the chemical nature of the solvent
    • Depends on the temperature of solute and solvent
    • The most common solvent is water
boiling point
Boiling Point
  • Boiling Point is the temperature at which liquid boils
  • Each pure substance has a specific boiling point
  • Examples:
    • B.P. of Water =100◦ C
    • B.P. of Nitrogen = -195.79◦C
    • B.P. of Silver = 2162◦C
    • B.P. of Carbon = 4072◦C
melting point
Melting Point
  • Melting Point is the specific temperature when melting occurs
  • Change from solid to a liquid
  • Each pure substance has it’s own melting point
  • Ex.
    • M.P. of Water = 0◦ C
    • M.P of Nitrogen = -209.9◦C
    • M.P. of Silver = 961.63◦C
    • M.P. of Carbon = 3500.0◦C
  • Density is a comparison of how much matter there is in a certain amount of space.
  • Ex. People in a square
periodic table
Periodic Table
  • Is a tabular display of the periodic chemical elements, organized on a basis of their properties
  • Elements are arranged left to right and top to bottom in order of increasing atomic number
  • Developed by Dmitri Mendeleev
  • Called “Groups” or “Families”
  • There are 18 groups number 1-18
  • Elements in the same group or family have similar characteristics or properties.
  • The horizontal rows of the periodic table are called periods.
  • There are 7 periods numbered 1-7
  • Elements in a period are not alike in properties.
  • The first element in a period is usually an active solid, and the last element in a period is always an inactive gas.
atomic number
Atomic Number
  • The number of protons in an atom is referred to as the atomic number of that element.
atomic mass
Atomic Mass
  • The atomic mass is the average mass of an element in atomic mass units ("amu"). 
mass number
Mass Number
  • The sum of the protons and neutrons that make up that nucleus.