How many protons and neutrons does oxygen-18 have? What is its mass number? The 57Fe atom has how many neutrons? How many neutrons are in the nucleus of an atom of Silver-107? How many neutrons are in the nucleus of an atom of u-235? How many protons and neutrons are in magnesium...
Around the nucleus of the atom, where the protons and neutrons live, there are electrons whizzing around. We used to think that they had certain circular orbits like the planets have around the sun, but have discovered that it is much more complicated, and much more exciting! Instead, the ...
Atoms are proved to be semi-classical electronic systems in the sense of closeness of their exact quantum electron energy spectrum with that calculated within semi-classical approximation. Introduced semi-classical model of atom represents the wave funct