What are the similarities between Mendeleev's periodic table and modern periodic table?

Question

Answer

Both have arranged elements known into
1) periods i.e. 18
2)groups i.e. 7
and provide a suitable space for the inert gas element

Answer

Similarities :
1) in both the periodic tables POSITION OF HYDROGEN is same (placed at 1st period of 1st group)
2) In both the periodic tables Noble gases get the space.
3) the predicted properties of undiscovered elements by Mendeleev is same in both periodic tables.

Answer

Mendeleev's periodic table.......

Mendeleev's periodic table is based on atomic mass

Mendaleev's periodic table contains about 66 elements.

In Mendeleev's periodic table there were gaps for undiscovered elements.

In Mendeleev's periodic table noble gases were not placed (as they are not discovered at that time)..

In Mendeleev's periodic table transition elements included with other elements

MORDERN.....

Modern periodic table is based on atomic number

Modern periodic table contains about 112 elements

Modern periodic table maintains uniformity

In Modern periodic table noble gases in a seperate group named as group-18

Modern periodic table transition elements placed in separate block.

I HOPE IT'S HELPFUL FOR US.....

Answer

Similarities between Mendeleev's periodic table and modern periodic table

Even though Mendeleev's periodic table was developed over 150 years ago, it still has some similarities to the modern periodic table. Here are some of the similarities:

Arrangement of elements by increasing atomic number: Both Mendeleev's periodic table and the modern periodic table arrange elements in order of increasing atomic number. This means that elements with similar chemical and physical properties are grouped together.

Use of groups and periods: Both periodic tables use groups (columns) and periods (rows) to organize elements. There are eight groups in Mendeleev's periodic table, while the modern periodic table has 18 groups.

Use of chemical symbols: Both periodic tables use chemical symbols to represent elements. For example, hydrogen is represented by the symbol H, and oxygen is represented by the symbol O.

Prediction of undiscovered elements: Mendeleev's periodic table had gaps where he predicted that undiscovered elements would fit. Similarly, the modern periodic table also has gaps where undiscovered elements are predicted to exist.

Similar properties of elements in the same group: Both periodic tables show that elements in the same group have similar chemical and physical properties. For example, all the elements in group 1 of the modern periodic table are highly reactive metals.

Answer

1. Metals and non-metals are placed separately in both periodic tables .
2. The properties of several elements are same .
3. The elements are arranged in groups and period .

Answer

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