to classify the elements mendeleev arranged the elements in increasing order of their Atomic Mass
This is the number of protons.
This is the number of protons.
Oxygen is placed in the second period of the Mendeleev table.
Mendelevium
It is element 101 Mendelevium.
atomic mass
This is the number of protons.
This is the number of protons.
Oxygen is placed in the second period of the Mendeleev table.
The basic organization structure was by atomic mass, which while it may follow a trend of increasing with each progressing element on the modern table, which is organized by atomic number or number of protons, there are a few exceptions, such as Argon having a greater atomic mass than Potassium, even though Argon has one less proton.
The first element of the Mendeleev's periodic table is hydrogen (H).
This element is mendelevium (element 101).
Dmitri Mendeleev used the property of bonding power when developing his periodic table. Bonding power refers to the number of bonds an element forms during a chemical change. But Mendeleev could not explain bonding power because he didn't know about the structure of atoms. (search Dmitri Mendeleev's periodic table)
mendeleev
Mendeleev
Helium
Mendelevium