<p>Atoms consist of electron, protons and neutrons. If the mass attributed to neutron was halved and that attributed to the electrons was doubled, the atomic mass of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML" class="wrs_chemistry"><mmultiscripts><mi mathvariant="normal">C</mi><none/><mn>12</mn><mprescripts/><mn>6</mn><mrow/></mmultiscripts></math>&nbsp;would be approximately:</p>