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

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

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

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

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

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