Question

what is the salient features of modern periodic table​

Answer 1

Explanation:

• Elements are arranged in the increasing order of atomic numbers.
• Elements in the modern periodic table are arranged in 7 periods and 18 groups.
• Horizontal rows are called periods and vertical columns are called groups.
• Elements are placed in periods based on the number of shells in their atoms.
• The shortest period is the first period which contains only two elements – Hydrogen and Helium.

Answer 2

Explanation:

Modern Periodic Table is based on modern periodic law and an elements are arranged in increasing order of their atomic number .Modern Periodic Table have 18 verticals columns called group .elements in any group of table have similar physical and chemical properties .

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