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How did Mendeleev know where to leave the spaces in his periodic table?

mandeleev didn't know spaces in the Periodic Table because he doesn't arrange it john Kepler arrange it most of mendeleev discoveries of elements are few most of other element where discover by other scientist after him in 19th century


How did Mendeleev arrange the chemical elements in the periodic table?

Mendeleev arranged the elements by their relative atomic mass. Each one of his rows began with an element that had 1 valency and ended it with inert gas elements. The creator of the Periodic Table, Dimitri Mendeleev, arranged the elements by atomic number (amount of electrons) and amount of electron shells. This then lead to columns (groups) of elements with the same amount of electrons in their outer shell. So, now, every period contains elements with ascending atomic numbers. Every group contains elements with ascending amounts of electron shells.


What prejudices did mendeleev have to overcome?

Dmitri Mendeleev faced prejudices due to his humble background as a son of a Siberian laborer, which was looked down upon in the academic and scientific circles of Russia at the time. He also faced resistance to his periodic table of elements from established chemists who were skeptical of his new ideas and organization of elements.


What Aristotle studied?

he studied the earth and what he think it looked like


How did Dmitri Mendeleev arrange the elements in the periodic table?

Mendeleev ordered the elements from lowest atomic mass unit (amu) to highest atomic mass unit.


Why was mendeleev's table so useful?

Because it organized all of the existing elements and helped scientist discover more elements.


What is a read drawing?

A drawing that has been looked at and studied (read)?


Where was astronomy first studied?

it was first studied by man when he was just created, he looked up at the stars and wondered. Many people think the Mayans were.


How do you spell examend?

The correct spelling of the past tense of to examine is examined (looked over, studied).


How do you use the word dapper in a sentence?

Melville studied his reflection and considered that he looked rather dapper, after all.


What is a sentence using the word fault?

Geographers studied earth and looked for signs of faults throughout the research


Did the periodic table all ways looked this way?

no because if you look back in time more they didn't know as much as we do now so we learn more over time so if you looked back in time you wold see that there would be gaps in random spots on the periodic table. :)