Circulating round the nucleus are the electrons in various orbits of different energy levels. Electrons are negatively charged and represented by the symbol 'e'. In the given image the number of protons are -6. Hence the element in question is Carbon as Carbon has the atomic number 6.
You can tell if each side of the equation has the same molar mass.
Carbon has 7 neutrons
Hope this helps
1128 is the momentum for this. i think
Fluoride and calcium are both helpful for stopping tooth decay
