Merits Of Mendeleev Periodic Table
Contents
What are the merits of Mendeleev periodic table?
Prediction of new elements : The existence and properties of elements that are similar to Boron/Aluminum/Silicon is predicted by Mendeleev. He left the gap after some elements and gave them hypothetical names such as Eka-Alumium/Eka-Silicon.
What are the three merits of the periodic table?
ADVANTAGES OF THE PERIODIC TABLE: –
It is easier to remember the properties of an element if its position in the periodic table is known. The periodic table has made the study of chemistry systematic and easy. It acts as an aid to memory. The type of compounds formed by an element can be predicted by knowing it position in the periodic table.
What are the three demerits of Mendeleev?
The demerits are: He did not gave place to isotopes. Position of rare earths and actinides could not be justified. Certain pairs of elements having higher atomic weights have been given position before the elements having lower atomic weights.
What are the 5 advantages of modern periodic table?
What are the advantages and disadvantages of Modern Periodic Table – The followings are the advantages and disadvantages of Modern Periodic Table:
| Advantages | Disadvantages |
|---|---|
| Allowing for the prediction of chemical properties | Being complex |
| Facilitating the study of chemical reactions | Being subject to change |
| Enhancing the understanding of chemical bonds | Lacking real-world applications |
| Providing a system for organizing elements | Being subject to interpretation |
| Facilitating the discovery of new elements | Requiring memorization |
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What are two advantages of Mendeleev periodic law?
Advantages of Mendeleev’s periodic table –
- Mendeleev’s periodic table symmetrically categorized the components. By recognizing the properties of one element, the properties of other elements and their compounds in the group are imagined, which makes the analysis of elements simpler.
- When Mendeleev’s periodic table was proposed, only 63 elements were inferred. Therefore, while categorizing the elements according to their properties, Mendeleev vacated some empty positions. These empty positions illustrated hidden elements. Moreover, Mendeleev anticipated the properties of these unknown elements based on their position. Eka-aluminium and Eka-site cons can be contemplated as an example.
- Accurate atomic masses of numerous elements were discerned with the support of Mendeleev’s periodic table.
What is the limitations of Mendeleev?
Limitations of Mendeleev’s periodic table: Elements with large differences in properties were included in the same group. For example, hard metals like copper and silver were included along with soft metals like sodium and potassium. No proper position could be given to the element hydrogen.
What are the four demerits of Mendeleev’s periodic table?
(i) Hydrogen has been placed in group I though it resembled to group VII as well. (ii) Positions of some elements was not justified. (iii) Isotopes were not given separate places. (iv) Lanthanides and actinides were not included in the table.
Why was Mendeleev’s periodic table not accepted?
Answer and Explanation: Mendeleev’s periodic table was rejected because he was unable to tell the location of a hydrogen atom in the periodic table. Also, when we move from one element to another, the increase in atomic number was not regular. Therefore, it is impossible to predict further elements.
What are the five merits of mean?
Properties of Arithmetic Mean: – 1) It is rigidly defined.2) It is based on all the observations.3) It is easy to comprehend.4) It is simple to calculate.5) The presence of extreme observations has the least impact on it.6) The sum of deviations of the items from the arithmetic mean is always zero.7) The Sum of the squared deviations of the items from A.M.
What are examples of merits and demerits?
Merit goods, demerit goods, and value judgements – Value judgements are personal opinions that characterise what a particular person finds desirable or not. Value judgments play a large role in determining which goods can be classified as merit and demerit goods.
- There are certain products that can clearly be defined as merit goods (like education and healthcare) and products that can clearly be defined as demerit goods (like tobacco and illegal drugs).
- However, due people’s different values and religions, there are certain goods for which the classification is not as easy.
For example, some view contraception as a merit good and others as a demerit good. Therefore, the classification depends on the value judgment of the person making the classification.
What is advantage vs merits?
As nouns the difference between merit and advantage is that merit is something deserving positive recognition while advantage is any condition, circumstance, opportunity or means, particularly favorable to success, or to any desired end.
What are the merits of classification of elements?
Hint: We know, the physical and chemical properties of an element are the periodic function of their atomic number. In the periodic table, the elements are arranged based on the atomic number. Complete step by step answer: Complete step by step answer: The method of grouping the elements into different classes is known as the periodic classification of elements.
- Need for classification: The classification is done based on similarities in properties and the classification gives a systematic study of elements that helps to understand the properties of elements.
- Now, we see the advantages of classifying the elements.1.Classification helps us to understand the properties of the elements and their compounds.2.Based on their position in the periodic table one can predict the properties of the elements and their compounds.3.It is easier to study, compare, and differentiate the properties of the elements and compounds from different groups.
Additional Information: Lavoisier’s classification: In this classification, the elements are classified as metals and nonmetals based on their physical properties like hardness, malleability, and luster. Limitations: 1.The physical properties such as hardness, malleability, and luster of sodium and lead were found to be common so they are classes together as metal but they are completely different.2.The major drawback of his classification was he never considered the semi-metal into his classification.
