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  • The sum of number of protons and neutrons present in the nucleus of an atom is called ______.

    atomic mass
    none of above
    atomic weight
    atomic number
  • The law, 'all the physical and chemical properties of elemnts are periodic function of their atomic weight' is given by ______.

    Mandeleev
    heisenberg
    none of above
    modern law
  • The vertical rows in a periodic table are called ______.

    nobel gases
    alkali metals
    period
    rows
  • The physical and the chemical properties of elements are the periodic functions of their atomic weights is ________________________.

    Mendeleev's periodic table
    Lothar's periodic table
    Dalton's periodic table
    Modern periodic table
  • which element symbol is derived from german language?? 1)Titanium 2)Tantalum 3)Tungsten 4)Tin

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