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Grade: 11
Classification of elements and periodicity in properties
2 months ago

Answers : (2)

24494 Points

Modern Periodic Law:

  • Properties of elements are the periodic function to their atomic numbers.

  • The periodicity in properties is due to repetition of similar outer shell electronic configuration at a certain regular intervals.

  • In modern periodic table is based on modern periodic law in which elements are arranged in increasing order of their atomic numbers.

  • In the modern periodic table, the elements are arranged in rows and columns.  These rows and columns are known as periods and  groups respectively.

  • The table consists of 7 periods and 18 groups

  • Period indicates the value of ‘n’ (principal quantum number) for the outermost or valence shell.

  • Same number of electrons is present in the outer orbitals (that is, similar valence shell electronic configuration

2 months ago
Vikas TU
11140 Points
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2 months ago
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