Question

meantion the main featuers of mordern peridic table​

Answer 1

Answer:

• modern periodic table has 18 groups and 7 period
• position to element is given on the basis of their atomic number (valence electrons)
• metallic properties are reduced when we move from left to right and increases when moved from top to bottom
• the group of element is decided by their valence electrons while the period is decided by the no of shells
• the size of atom of element increase going left to right as no of shells increases

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