Question

Ib Modern Periodic table the number of columns and periodic are _ _ _ and _ _ _ respectively

1) 16 , 7
2) 6 , 16
3) 18 , 7
4) 18 , 6​

Answer 1

Answer:

3) 18,7

Explanation:

The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table. And it consists of 18 vertical columns and 7 horizontal rows.