Question

Element in modern periodic table are arranged in ____ groups and ______ periods table
A)7,18 b) 18,7 c) 17,8 d)8,17​

Answer 1

Answer:

Elements in modern periodic table are arranged in 18 group and 7 periods table.

b) 18,7 . is the correct option

Explanation:

because , in modern periodic table , there are 18 groups and 7 horizontal rows.

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