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How do mendeelevs periodic table and todays periodic table differ?
Wiki User
∙ 12y ago
When Mendeleev's Periodic Table was devised, some elements hadn't been discovered yet. Therefore, there had to be gaps in it or the table would be rendered incorrect.
The rule of similarities states that the elements within a specific period/column are similar in a way and have the same number of electrons in the outer shell. E.g. Period 1 (alkali metals) react strongly with both air and water, have to be stored in oil, and are very alkali, hence the name.
Mendeleev used this rule to construct the periodic table. The amazing thing is, he guessed where elements were missing and left gaps. He even estimated their atomic masses!
In short, Mendeleev's periodic table had some bits missing. (e.g. technetium, discovered in 1936, a whole 65 years after Mendeleev's table was devised in 1871)
P.S. It's Mendeleev, not Mendeelev.
Wiki User
∙ 12y ago
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How was mendeleevs periodic table like todays periodic table?
it has elements
Why do rows in the periodic table differ in length?
tthere ordered by numbers
What is the name of the table of elements?
A Periodic table The Periodic Table of the Elements.
Which element is the heaviest in periodic table?
who introduced the first Periodic Table
Which can be found on a periodic table elements compounds or mixtures?
Elements are found on periodic table. Compounds are not present on periodic table. The table does not contains mixture.Elements can be found on a periodic table. Compounds can be made by bonding two or more elements. But they are not depicted on the periodic table.
How was mendeleevs periodic table like todays periodic table?
it has elements
Why do rows in the periodic table differ in length?
tthere ordered by numbers
How does the location of semiconductors on the periodic table differ from the locations of other element families?
b
How do the chemical symbols differ from chemical symbols found on the periodic table?
so that we can identifythem
What is the name of the table of elements?
A Periodic table The Periodic Table of the Elements.
How are the elements arranged?
atomic number
Do all elements of the periodic table have the same type of atoms?
No. Atoms differ in number of protons, neutrons and electrons.
How does the modern day periodic table of elements differ from Mendeleyevs chart?
The amount of elements included, and the fashion in which they are presented.
What is a group in a periodic table.?
A group in Periodic Table is the column of element in periodic table
What is a chart that lists all the known elements?
It is called the Periodic Table of Elements.
Is snow on the periodic table?
No, it is not on the periodic table.
In the periodic table what is a period?
A period on the periodic table is a row.This is the horizontal section of the periodic table.
