Write two merits & demerits of mendeleev's periodic table.
Answers
Answer:
Two advantages/merits of Mendeleev's periodic table-
1. It is a unique venture in the world of science, where he has simply arranged the elements along the stages and classes.
2. As a result, it is easy to know what kind of religion, what kind of behavior, etc. of an element.
The two disadvantages/demerits of Mendeleev's periodic table-
1. Mendelssohn emphasized the importance of atomic weight, saying that the physical and chemical properties of elements are repeated over and over again according to their increased atomic importance. But in fact it is influenced by the atomic number.
2. There is a lot of debate about the position of hydrogen in the periodic table. According to the nature and variety of hydrogen, it can be ranked in class 1 and class 17. So it's a lot of controversy. That's why Mendeleev named hydrogen the "evil element" in his periodic table.
Thank you,hope you understand. More chemistry questions show in my answers for your convenience.
Answer:
merits
1)He used a broader range of physical and chemical properties to classify elements.
2)He, relied on empirical formula and properties of compounds formed by the elements.
demerits
1)The classification of all elements except some elements are based on atomic weights.
2)Most of the elements were not discovered at his time.