Chemistry books say that he grouped the elements by atomic weight. That is not the same as density.
mendeleev's name for a column of elements was groups.
Mendeleev grouped lithium with potassium and sodium in his periodic table based on their similar chemical properties and valence electron configurations. He recognized that these elements belonged to the alkali metal group.
The Halogens. Other elements in this group are Fluorine, Chlorine, Bromine and Astatine.
Mendeleev arranged the known elements by increasing atomic mass and grouped elements with similar properties together. Gaps in the table indicated elements that were yet to be discovered. By observing the patterns in the properties of known elements within each group, Mendeleev was able to predict the properties of the undiscovered elements that would fill these gaps.
alkaline metal group(or the group 1 elements, except for hydrogen(H), which is a group 1 element but not an alkali metal) - lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
mendeleev's name for a column of elements was groups.
It is true.
"Family of elements" is the synonym of group (column) in the periodic table of Mendeleev.
Generally the density of the chemical elements is increasing from the top to the bottom of the periodic table of Mendeleev.
Mendeleev grouped lithium with potassium and sodium in his periodic table based on their similar chemical properties and valence electron configurations. He recognized that these elements belonged to the alkali metal group.
Group 7 of the periodic table of Mendeleev and period 7 (transfermium elements).
i have no idea but i will check and keep you posted.
Oxygen is in the group 16 of the periodic table of Mendeleev - chalcogenides group.
Group 3, period 4 in the Mendeleev periodic table of the elements.
Group 2, period 2 in the Mendeleev table of elements.
This is the group 18 of the periodic table of Mendeleev.
Berkelium is in the period 7 of the Mendeleev table of chemical elements and in the group of actinides.