Fluorine is a non metal element. Mass number of it is 19.
add the number of protons and nuetrons together
The sum of the number of protons and the number of nuetrons.
The number of neutrons and protons together constitutes the mass number of a single isotope of an element.
mass number = protons + nuetrons
The isotopes of the same element has the same atomic number. But the mass number (atomic mass) is different.
Subtract the number of protons from the elemental mass number for the isotope of the element given to find the number of neutrons.
Atomic mass increases with the ordered placement of the element of the periodic table. Conveniently, the number of protons, nuetrons and electrons also increase with numbered order on the table. Every element is assigned a number. This number is equal to the number of protons, nuetrons and electrons. I believe it's the nuetrons that make up the mass of the element, but not sure!
well you look at the periodic table of elements. the atomic number equals the number of protons. Then subtract the number of protons from the atomic mass (both protons and nuetrons have atomic mass units of 1 and electrons equal 0). That will give you the number of nuetrons.
To calculate the atomic mass of an element, add up the mass of protons and nuetrons.
The mass number
the atomic mass of just pure carbon would be twelve. the atomic mass is only effected by the number of protons and numbers of nuetrons