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    6.1 Classification of Elements

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    Hema Lata
    Matter is made up of tiny particles called atoms, which consist of protons, neutrons, and electrons. Elements are the simplest forms of matter and are made of only one type of atom, while compounds are formed by the chemical combination of two or more elements. Metals are elements that are shiny, ductile, and good conductors of heat and electricity, while nonmetals have dull appearances and are brittle, weak conductors.

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    6.1 Classification of Elements

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    Hema Lata
    54 views16 pages
    Matter is made up of tiny particles called atoms, which consist of protons, neutrons, and electrons. Elements are the simplest forms of matter and are made of only one type of atom, while compounds are formed by the chemical combination of two or more elements. Metals are elements that are shiny, ductile, and good conductors of heat and electricity, while nonmetals have dull appearances and are brittle, weak conductors.

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    Matter is made up of tiny particles called atoms, which consist of protons, neutrons, and electrons. Elements are the simplest forms of matter and are made of only one type of atom, while compounds are formed by the chemical combination of two or more elements. Metals are elements that are shiny, ductile, and good conductors of heat and electricity, while nonmetals have dull appearances and are brittle, weak conductors.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    54 views16 pages

    6.1 Classification of Elements

    Uploaded by

    Hema Lata
    Matter is made up of tiny particles called atoms, which consist of protons, neutrons, and electrons. Elements are the simplest forms of matter and are made of only one type of atom, while compounds are formed by the chemical combination of two or more elements. Metals are elements that are shiny, ductile, and good conductors of heat and electricity, while nonmetals have dull appearances and are brittle, weak conductors.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 16

    Chapter 6

    6.1 Classification of
    Elements
    Learning Objectives :

    • Conclude that all matter consists of atoms.


    • Differentiate between atoms and
    molecules as wellas elements and
    compounds.
    • Recognize elements in periodic table
    Matter
    consists of
    small and
    discrete
    particles
    which
    • cannot arewith our naked eyes because its size
    be seen
    is too small
    known as
    • can only be seen using an electron microscope by
    atomsthe atom to a million times.
    enlarging
    Proton :
    positively
    Atom consists of
    charged three subatomic
    particles particles, which
    are protons,
    Neutron
    : neutral neutrons and
    particles electrons.

    Electron
    : Nucleus :
    negativel protons and
    y neutrons
    charged
    particles
    How to
    Remember?
    •Proton (+)
    •Electron ( - )
    •Neutron
    The nucleus has
    an overall
    positive charge
    due to the
    positively-
    charged protons
    in it.
    The number of
    electrons in an
    atom is equal to P=E
    the number of
    protons. Thus, an
    Oxyge
    Atom
    n (neutr
    al)
    Molecul
    es
    Molecules are neutral
    Oxyge Oxyge particles made up of
    n n two or more atoms.
    What is an Element?
    An element is the
    simplest form of
    substance.
    It cannot be divided to
    two or more simpler
    substances.
    There is only one type of
    atom in an element.
    What is a Compound?
    A compound consists of two or more elements combined
    chemically.
    It is produced from a chemical reaction.
    Compounds can be produced in the laboratory or in a natural
    environment.
    Examples of compounds are aluminium oxide, zinc sulphide, iron
    chloride, sugar, water and salt.
    Metals Similarities Non-metals
    E.g. Copper • Both are elements E.g. Carbon
    Differences
    shiny Appearance dull
    ductile Ductility (able to Non-ductile
    bend)
    malleable Malleability(able to Non-malleable
    flatten)
    High Tensile strength Low (break easily)
    good Electrical Bad
    conductivity
    good Heat conductivity bad
    High Density Low
    High Melting and boiling Low
    Metals
    Non-metal
    Amali Book
    Activity 6.1
    Exercise 6.1
    1.State the subatomic particles of atom.
    Draw a simple structure of atom.
    2. Why atom cannot be seen with naked
    eyes? How to overcome this problem?
    3. What is an element and compound?
    4. Give examples of metals based on the
    Periodic Table in your textbook.

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