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What are the most important attempts
Mendleev's periodic table, moseley's periodic table and the modern periodic table
A table in which the elements are arranged in an ascending order according to their atomic numbers
Moseley's periodic table
The first real preodic table for classifying element
Mendleev's periodic table
Who is the scientist that discovered that nucleucs of the atom contains positively charged protons
Rutherford
The modern periodic table consists of...... main blocks
4
Complete / the modern periodic table consists........ vertical groups
18
complete / The modern periodic table consists of........ horizontal periods
7
The number of known elements in modern periodic table till now is
118
The number of elements which exist in nurture according to the modern periodic table
92
The scientist who left empty cells in the table to be filled with discovered elements in future
Mendleev
G.R/ Mendleev had to put more than one element in one cell
Due to the similarity in their properties
G.R/mendleev would have to deal with isotopes of one element which were discovered later as different elements
Due to the difference in their atomic weights
G.R / mendleev had to make disturbance in the ascending order of atomic weights of some elements
To put them in groups that suits their properties
What was the name of the book that mendleeve explained his periodic table in?
The principles of chemistry
How many elements was in mendleev's periodic table
67
What are the disadvantages of Mendleev's periodic table
....
What are the advantages of Mendleev's periodic table
......
How did mendleev classify elements
.......
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