Question

In revised Mendeleev's periodic table, how many elements are there in seventh period?

Answer 1

Mendeleev's periodic table:

• Dimitri Ivanovich Mendeleev arranged all the 63 elements known at that time in increasing order of their atomic mass.
• Mendeleev's periodic law states that physical and chemical properties are the periodic function of their atomic masses.
• Mendeleev's periodic table consists of the vertical columns called groups and horizontal rows called periods.

Number of elements in the seventh period:

There are 32 elements in the seventh period of revised Mendeleev's periodic table. It is also called the longest period, but it is incomplete.