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Salient Features of the Modern Periodic Table

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Topics

  • Definition: Groups
  • Definition: Periods
  • Definition: Typical Elements
CISCE: Class 10

Definition: Groups

The modern periodic table has eighteen vertical columns. Each vertical column accommodates elements with the same number of electrons in the outermost shell. These vertical columns are known as Groups.

CISCE: Class 10

Definition: Periods

There are seven horizontal rows in the modern periodic table. They are known as Periods.

CISCE: Class 10

Definition: Typical Elements

The third period elements, Na, Mg, Al, Si, P, S and Cl, summarise the properties of their respective groups and are called typical elements.

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