8 The importance of the heat (thermal energy) February 11, 2015 by Heba Soffar · Published February 11, 2015 · Last modified November 19, 2019
0 The properties and uses of some elements in the modern periodic table October 27, 2014 by Heba Soffar · Published October 27, 2014 · Last modified November 27, 2019
0 Atoms components, Rutherford and Bohr’s Atomic Models December 28, 2016 by Heba Soffar · Published December 28, 2016 · Last modified September 21, 2019
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