You can access this free training by: 1  Go to https://pcau.enspark.com. 2  Complete Registration. Parents must select I am a Parent of a Student. 3  Click the Registration Button. 4  Click Launch Course. 5  Complete the one-hour training. 6  There will be a Certificate of Completion issued at the end of the course.
# of neutrons = Mass Number - Number of Protons. To be able to apply this formula, refer to the atomic number and atomic weight of the elements. These two are listed in the Periodic Table of Elements. Take note that atomic number refers to the number of protons in an atom of an element.
The mass number is the count of these particles and so the mass number is very close to the atomic mass. Atomic number. Atomic number refers to the number of protons in nucleus. It is often denoted using the symbol Z. The number of electrons in the neutral atom is equal to the number of protons in the nucleus and therefore equal to the atomic number of the atom.