Practice Test | Kullabs.com
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  • The law "all the physical and chemical properties of elements are the periodic functions of their atomic number " is given by ______.

    mandeleeves law
    modern law
    none of these
    heseingberg law
  • According to Mendeleev the properties of an element are periodic function of their _______.

    number of protons
    no of electrons
    atomic mass
    atomic number
  • Hennery Mosely in 1913 corrected Mendeleev's theory and said the properties of an element are periodic function of their ______.

    number of protons
    atomic number
    atomic mass
    no of electrons
  • How many groups are there in modern periodic table?

    18
    19
    16
    15
  • How many periods are there in modern periodic table?

    6
    7
    9
    8
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