A. The Nucleus is where the neutrons and protons are piled together. In the first energy level there are 2 electrons. In the second energy level there are 5 electrons. The protons are positive red. The neutrons are green. The electrons are negative yellow.
b. There are 7 protons in the atom
c. There are 7 neutrons in the atom
d. There are 7 electrons in the atom.
e. The atomic number is 7. (You can calculate it by thinking it as Atomic number = number of protons)
f. The mass number is 14. (You can calculate mass by adding the protons and the neutrons together)
