30 elements symbols and atomic number and atomic mass July 8, 2019 16 32 64 128 First 30 elements with symbols and atomic number and atomic mass 1 to 30 elements with symbols and atomic number and atomic mass 30 elements with symbols and atomic number and mass number class 9 1 to 30 elements with symbols and atomic mass and atomic number and valency Аттуу сандар 3 класс
