the mass number is used to calculate the number of-----------in one atom of an element. in order to calculate the number of neutrons you must subtract the ------from the-----------
# protons + # neutrons = mass number. That information is all you need to fill in the blanks.
Lasos
The mass number is used to calculate the number of protons and neutrons in one atom of an element. In order to calculate the number of neutrons, you must subtract the atomic number from the mass number.
To find the mass number, you can look up the element on the periodic table. The mass number is usually located right above the element's symbol. It represents the total number of protons and neutrons in the nucleus of an atom.
The atomic number, on the other hand, represents the number of protons in an atom. It is also found on the periodic table and is typically located below the element's symbol.
To calculate the number of neutrons, you subtract the atomic number (number of protons) from the mass number. This is because the mass number includes both protons and neutrons, so by subtracting the atomic number from the mass number, you are left with the number of neutrons.
For example, let's use the element oxygen (O) as an example. The atomic number of oxygen is 8, and the mass number is 16. By subtracting the atomic number from the mass number (16 - 8), you can find that there are 8 neutrons in one atom of oxygen.