Question

The modern periodic table contains ________groups ​

Answer 1

The modern periodic table contains 18 groups ..

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Answer 2

Explanation:The modern periodic table of the elements contains 18 groups, or vertical columns. Elements in a group have similar chemical and physical properties because they have the same number of outer electrons. Elements in a group are like members of a family--each is different, but all are related by common characteristics.

The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columnor groups. The elements in each group have the same number of valence electrons.