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    write the atomic number of the element present in the third period and seventeenth group of the periodic table

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    Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

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    Updated on : 2022-09-05

    The Element present in third period and seventeenth group of the periodic table is Chlorine

    Solution Verified by Toppr

    Atomic number of Chlorine is 17.

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    Write the atomic number of the element present in the third period and seventeenth group of the periodic table. Chemistry Question

    Question

    Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

    Open in App Solution

    Periodic table:

    The periodic table is an arrangement of all the elements known to man in accordance with their increasing atomic number and recurring chemical properties.

    It consists of horizontal rows called Periods. There are a total of

    7 periods.

    And vertical columns are called groups. There are a total of

    18 groups.

    Identifying the element present in the third period and a seventeenth group of the periodic table:

    The first period of the periodic table has a total of

    2 elements.

    The second period of the periodic table has a total of

    8 elements.

    The third period also consists of

    8 elements.

    The third period begins with the element having an atomic number,

    Z=11 .

    In the third period, the first two elements( with

    Z=11 & 12 ) fall in group 1 and 2 . Elements with Z=13

    Onwards are placed in group

    13 onwards.

    As a result of which, the element with atomic number

    Z=17

    is present in group seventeenth and third period of the periodic table.

    The element is Chlorine having atomic number 17.

    Suggest Corrections 5

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    Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

    In the third period the filling up of only 3s and 3p-orbitals occur. Therefore, in this period there are only two s- and six p-biock elements. Since the third period (n = 3) starts with Z = 11 and ends at Z = 18, hence the element is chlorine (CI) with atomic number (Z) = 17 which is present in the third period and seventeenth group of the periodic table.

    Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

    In the third period the filling up of only 3s and 3p-orbitals occur. Therefore, in this period there are only two s- and six p-biock elements. Since the third period (n = 3) starts with Z = 11 and ends at Z = 18, hence the element is chlorine (CI) with atomic number (Z) = 17 which is present in the third period and seventeenth group of the periodic table.

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