Question

elements who have similar chemical properties in the modern periodic table​

Answer 1

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

Answer 2

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hope you understand !!!!!!!!!!

The vertical columns have similar properties within their group for example Lithium is similar to sodium