Punjab Chemistry Online 9th Class Test Lesson 3 Periodic Table and Periodicity of Properties

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Periodicity is one of the most fundamental aspects of the periodic table of the elements. Here is an explanation of what periodicity is and a look at the periodic properties. The modern periodic table is very similar to Mendeleev’s table, but today elements are ordered by increasing atomic number, which reflects the number of protons in an atom.

Periodic Table and Periodicity of Properties Lesson 3 Chemistry Online Test 9th Below




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4 Responses to “Punjab Chemistry Online 9th Class Test Lesson 3 Periodic Table and Periodicity of Properties”

  1. Sâmëêl ßutt

    Mar 25. 2016

    i got 92% but the answer to one question was wrong.carbon is the bigger size atom in the following…

    Reply to this comment
  2. ABEEHA MALIK

    Mar 25. 2016

    quickly btain q k i have short time of half day so plz jhaldi kren any one plz help me

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  3. ABEEHA MALIK

    Mar 25. 2016

    bhai mera tomorrow chemistry ka paper hai koi short ya long questions k guess hi bta den on my this email adress (abduljabbarhello38@gmail.com)plz plz

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    • Sâmëêl ßutt

      Mar 25. 2016

      me ne send kr di ha mail apko.. wo read krlo bus.. clear

      Reply to this comment

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