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    Periodic Table of Elements

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    CoOlz_lol
    The document summarizes key aspects of the periodic table, including its organization of elements according to atomic number and properties. Elements are arranged in rows called periods and columns called families, with similar properties recurring in families. The periodic table provides information on each element's atomic number, mass, and common properties like conductivity and phase. Dmitri Mendeleev created the first accepted periodic table in 1869 by organizing elements by mass and recognizing recurring properties in families.

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    Periodic Table of Elements

    Uploaded by

    CoOlz_lol
    22 views32 pages
    The document summarizes key aspects of the periodic table, including its organization of elements according to atomic number and properties. Elements are arranged in rows called periods and columns called families, with similar properties recurring in families. The periodic table provides information on each element's atomic number, mass, and common properties like conductivity and phase. Dmitri Mendeleev created the first accepted periodic table in 1869 by organizing elements by mass and recognizing recurring properties in families.

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    Periodic Table (1)(2)

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    The document summarizes key aspects of the periodic table, including its organization of elements according to atomic number and properties. Elements are arranged in rows called periods and columns called families, with similar properties recurring in families. The periodic table provides information on each element's atomic number, mass, and common properties like conductivity and phase. Dmitri Mendeleev created the first accepted periodic table in 1869 by organizing elements by mass and recognizing recurring properties in families.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    22 views32 pages

    Periodic Table of Elements

    Uploaded by

    CoOlz_lol
    The document summarizes key aspects of the periodic table, including its organization of elements according to atomic number and properties. Elements are arranged in rows called periods and columns called families, with similar properties recurring in families. The periodic table provides information on each element's atomic number, mass, and common properties like conductivity and phase. Dmitri Mendeleev created the first accepted periodic table in 1869 by organizing elements by mass and recognizing recurring properties in families.

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    of 32

    Periodic Table of Elements

    chlorine
    nitrogen

    silver
    gold

    mercury
    oxygen hydrogen
    helium
    niobium
    sodium
    neodymium
    carbon
    Periodic Table
     The periodic table organizes the elements in a
    particular way. A great deal of information about an
    element can be gathered from its position in the
    period table.
     For example, you can predict with reasonably good
    accuracy the physical and chemical properties of
    the element. You can also predict what other
    elements a particular element will react with
    chemically.
     Understanding the organization and plan of the
    periodic table will help you obtain basic information
    about each of the 118 known elements.
    Key to the Periodic Table
     Elements are organized on
    the table according to their
    atomic number, usually
    found near the top of the
    square.
     The atomic number
    refers to how many
    protons an atom of that
    element has.
     For instance, hydrogen
    has 1 proton, so it’s
    atomic number is 1.
     The atomic number is
    unique to that element.
    No two elements have
    the same atomic number.
    What’s in a square?
     Different periodic
    tables can include
    various bits of
    information, but
    usually:
     atomic number
     symbol
     atomic mass
     number of valence
    electrons
     state of matter at room
    temperature.
    Atomic Number
     This refers to how
    many protons an
    atom of that
    element has.
     No two elements,
    have the same
    number of protons.

    Bohr Model of Hydrogen Atom

    Wave Model
    Atomic Mass
     Atomic Mass refers
    to the “weight” of
    the atom.
     It is derived at by
    adding the number
    of protons with the
    number of This is a helium atom. Its atomic
    Hmass is 4 (protons plus neutrons).
    neutrons.
    What is its atomic number?
    Atomic Mass Unit (AMU)
     The unit of
    measurement for
    an atom is an AMU.
    It stands for atomic
    mass unit.
     One AMU is equal
    to the mass of one
    proton.
    Atomic Mass Unit (AMU)
     There are
    6 X 1023 or
    600,000,000,000,000,
    000,000,000 amus in
    one gram.
     (Remember that
    electrons are 2000
    times smaller than
    one amu).
    Symbols
     All elements have

    C Carbon 
    their own unique
    symbol.
    It can consist of a
    single capital letter,

    Cu
    or a capital letter
    and one or two
    lower case letters.
    Copper
    Common Elements and
    Symbols
    Properties of Metals
     Metals are good conductors
    of heat and electricity.
     Metals are shiny.
     Metals are ductile (can be
    stretched into thin wires).
     Metals are malleable (can
    be pounded into thin
    sheets).
     A chemical property of
    metal is its reaction with
    water which results in
    corrosion.
    Properties of Non-Metals
     Non-metals are poor
    conductors of heat and
    electricity.
     Non-metals are not
    ductile or malleable.
     Solid non-metals are
    brittle and break
    easily.
     They are dull.
     Many non-metals are
    gases.
    Sulfur
    Properties of Metalloids
     Metalloids (metal-like)
    have properties of both
    metals and non-metals.
     They are solids that can
    be shiny or dull.
     They conduct heat and
    electricity better than non-
    metals but not as well as
    metals.
     They are ductile and
    malleable.

    Silicon
    Families Periods
     Columns of elements are called  Each horizontal row of
    groups or families. elements is called a period.
     Elements in each family have  The elements in a period
    similar but not identical are not alike in properties.
    properties.
     In fact, the properties
     For example, lithium (Li),
    change greatly across
    sodium (Na), potassium (K),
    and other members of family IA
    even given row.
    are all soft, white, shiny metals.  The first element in a
     All elements in a family have period is always an
    the same number of valence extremely active solid. The
    electrons. last element in a period, is
    always an inactive gas.
    Mendeleev
     In 1869, Dmitri Ivanovitch
    Mendeléev created the first accepted
    version of the periodic table.
     He grouped elements according to
    their atomic mass, and as he did, he
    found that the families had similar
    chemical properties. 
     Blank spaces were left open to add
    the new elements he predicted
    would occur. 

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