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

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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