How are there 7 periods in mendeleev's periodic table when only 6 are mentioned in the table given in ncert?
Dear student,
The above periodic table has 6 periods and 7 groups. Horizontal rows are called periods and vertical column are called groups. I hope this clears your doubt.
Regards
The above periodic table has 6 periods and 7 groups. Horizontal rows are called periods and vertical column are called groups. I hope this clears your doubt.
Regards