• 10-27   Beginning of Matter: Properties and Change

    EQ:  What are the parts of an atom and its terminology?

    Voc:

    1)     Element:  Contains only one kind of atom

    2)    Molecule:  Contains two or more atoms

    3)    Atom:  Smallest part of an element

    There are 3 parts of an atom

    1)     Proton = positive charge (next largest part)

    2)    Element = negative charge (smallest part)

    3)    Neutrons = neutral (largest part)

     

    4)     Nucleus:  Center of an atom where protons and neutrons are located

     

    5)    Atomic Number:  The number of protons in the nucleus

     

    6)    Atomic Mass:  The number of protons and neutrons

     
          

    11-3

     

    EQ:  What is the periodic table used for?  Info on periodic table

     

    1)     The periodic table is a tabular arrangement of chemical elements, organized on the basis of their atomic number (# of protons in the nucleus), electron configuration, and recurring chemical properties.

     

    2)     Alkali and Alkaline metals are known as bases defined as being the opposite of acids.  PH values lower than 7 are acidic, and PH values higher than 7 are alkaline (basic).

     

    3)    Transition metals:  Have an amazing ability to bond with a variety of other elements to form alloys (a material composed of two or more metals or metal and a nonmetal)

    Example:  Brass is an alloy made of copper and zinc

     

    4)     Halogens:  (means salt giver) Most are produced from minerals or salt.  All halogens form acids when bonded with hydrogen.  Most common halogen bonding is NA + CL = table salt.

     

    5)    Noble gases:  Also meaning “inert gases” meaning completely unreactive

     

    6)    All elements can be classified as nonmetals, metals or metalloids (properties in between, or is a mixture of, those of metals and nonmetals)  Most common are Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As) and Antimony (Sb)