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