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Define group and period with reference t...

Define group and period with reference to the Modern Periodic Table. 

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Group is the vertical column of elements and period is the horizontal rows of elements in the Modern Periodic Table.
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State the modern periodic law.

State the modern periodic law for classification of elements. How many (a) groups and (b) periods are there in the modern periodic table ?

Knowledge Check

  • The number of groups and periods in the modern periodic table respectively, are

    A
    7 and 9
    B
    18 and 7
    C
    7 and 18
    D
    9 and 7

  • The longest period in the Modern Periodic Table is the

    A
    Third period
    B
    Fourth period
    C
    Fifth period
    D
    Sixth period

  • Halogens are present in which group of the Modern Periodic Table?

    A
    1st
    B
    12th
    C
    17th
    D
    18th

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    Explore conceptually related problems

    a] Write the trend of atomic size and metallic character along a group and a period in the Modern Periodic Table. b]"Elements in the periodic table show periodicity of properties." List any four such properties.

    How many groups and periods are there in the modern periodic table? How do the atomic size and metallic character of elements vary as we move ? (i) down a group and (ii) from left to right in a period.

    Compare and contrast the arrangement of elements in Mendeleev's periodic table and the Modern Periodic Table.

    Why is hydrogen placed separately on the top left corner of the Modern Periodic Table?

    Group I elements in the Modern Periodic Table are known as

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