This chemist is Dmitri Mendeleev (1869).
bohr
There are 7 periods in the modern periodic table.
It was named by Russian chemist Dmitri Mendeleev in 1869, in memory of his then recently-deceased colleague and clandestine "gentleman friend", Benjamin D. Periodic.
Modern periodic table is based on modern periodic law which states that physical and chemical properties of elemnts are periodic function of their atomic numbers.
Dmitri Mendeleev developed the modern periodic table in 1869.
Dmitri Mendeleev developed the first periodic table. But the modern table was developed by Henry Moseley.
Niels Bohr
There are 7 periods in the modern periodic table.
The modern periodic table has seven periods.
Modern periodic table is invented by Henry Moseley.
gorge washington
It was named by Russian chemist Dmitri Mendeleev in 1869, in memory of his then recently-deceased colleague and clandestine "gentleman friend", Benjamin D. Periodic.
Dimitri Mendeleev is credited with the the creation of the first modern and rational periodic table of chemical elements; but other chemists also had contributions.
Dimetri Mendeleev was a Russian chemist. He is credited for his version of periodic table which was better than anyone else's during that time. He organized elements almost accurately and formed the basis for the Modern Periodic Table.
Periodic table of elements.
Modern periodic table is based on modern periodic law which states that physical and chemical properties of elemnts are periodic function of their atomic numbers.
modern periodic law
Dmitri Mendeleev developed the modern periodic table in 1869.