<span>nuclear symbol consists of three parts: 1. the symbol of the
element; 2. the atomic number of the element;3. the mass of the element. for
the above problem, the symbol for potassium is k. it's atomic number is 40. the
number of protons is 19. so we denote this in the following nuclear symbol; 40
k 19</span>
a homogeneous mixture is a mixture that appears to be one thing. for example air would be one.
<span>it is A. Mendeleev observed that tellurium has chemical....</span>
Running water. Streams, lakes, rivers, ponds, oceans- all affect the Earth's landscape.
