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 ______.

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

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

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

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

    9
    6
    7
    8
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