Difference Between Mendeleev and Modern Periodic Table

The main difference between Mendeleev and Modern Periodic Table is that Mendeleev's periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number.

1. What is the difference between Mendeleev periodic table and modern periodic table?
2. What is the difference between modern periodic table and long form of periodic table?
3. What are disadvantages of Mendeleev's periodic table?
4. What are the limitations of modern periodic table?
5. What is the rarest element on earth?
6. What is a modern periodic table?
7. How many groups are in the periodic table?
8. What are merits and demerits of Mendeleev's periodic table?
9. Why did Mendeleev leave gaps in periodic table?
10. What are the features of Mendeleev periodic table?

What is the difference between Mendeleev periodic table and modern periodic table?

This law modifies the Mendeleev's periodic table into the Modern periodic table.
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Complete step by step solution:

What is the difference between modern periodic table and long form of periodic table?

Answer. No, there are no difference is the long form of periodic table and modern periodic table. - The first concept of periodic table was given by Mendeleev. ... - This rewritten version of periodic table was longer than the Mendeleev's periodic table due to addition of several newly added elements.

What are disadvantages of Mendeleev's periodic table?

Demerits of Mendeleev Periodic Table

• He was unable to locate hydrogen in the periodic table.
• Increase in atomic mass was not regular while moving from one element to another. ...
• Later on, isotopes of elements were found which violated Mendeleev's periodic law.

What are the limitations of modern periodic table?

Answer. (a) Position of hydrogen: It could not assign a correct position to hydrogen in the table. (b) The lanthanides and actinides are not placed in the main body of the table. (c) Position of isotopes: There are no separate positions for isotopes of an element.

What is the rarest element on earth?

A team of researchers using the ISOLDE nuclear-physics facility at CERN has measured for the first time the so-called electron affinity of the chemical element astatine, the rarest naturally occurring element on Earth.

What is a modern periodic table?

The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. ... Elements in the same group have similar properties.

How many groups are in the periodic table?

The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups.

What are merits and demerits of Mendeleev's periodic table?

Merits and demerit of mendeleev's periodic table

• There was a regular gradation in physical and chemical properties of elements.
• The group number of an element indicates highest oxidation state that it can attain.
• There were many vacant spaces in Mendeleev's periodic table for the elements to be discovered.

Why did Mendeleev leave gaps in periodic table?

Mendeleev's periodic table is an arrangement of the elements that group similar elements together. He left blank spaces for the undiscovered elements (atomic masses, element: 44, scandium; 68, gallium; 72, germanium; & 100, technetium) so that certain elements can be grouped together.

What are the features of Mendeleev periodic table?

The periodic table is composed of seven horizontal rows or periods and is numbered between 1 to 7. There is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right. The periodic table is composed of eight vertical columns or groups. They are numbered between 1 to 8.