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

Answer 1

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.

Answer 2

1. He placed the name of each element on a sheet of paper with its mass and chemical and physical properties.
2. Then arranged cards according to various properties and looked for trends.
3. Arranged in order of increasing atomic mass.
4. Left empty spaces and predicted properties of missing elements.

Answer 3

At first, he arranged them in order of increasing atomic mass. This allowed him to group elements in columns and rows where they showed similar properties. This presented a few problems though. Later, he had to tweak it and arrange it in order of increasing atomic number, which worked out a little better. We've been using it that way ever since.

Answer 4

medeleev knew that same elements have a semilar chemical and physical properties.

Answer 5

He arranged the elements in his periodic table in order of increasing atomic mass. Note that there were only 63 elements at the time, and the current #2 element, Helium, was not found yet.

Answer 6

using mass