Atomic Mass: 18.998404
Atomic number of Fluorine is 9.Mass number of Fluorine is 19.
Fluorine (F), the isotope 19F.
Fluorine is a non metal element. Atomic mass number of it is 19.
It contains 10 protons and 10 electrons (no. of protons =no. of electrons in ground state) Number of neutrons=Mass number of element- number of protons =19-10 =9
Uranium is a non metal element. Atomic mass of it is 238.
If you asking what it is, it is potassium.
Rubidium is a metal element. Mass number of it is 85.
Sodium is a metal element. Mass number of it is 23.
The atomic number of an element is the number of protons in the nucleus of each atom of the element. Mass number is a property of a particular isotope of the element rather than of the element itself: The mass number is the sum of the numbers of protons and neutrons in the nucleus of each atom of the isotope.
Vanadium is a metal element. Mass number of it is 51.
Magnesium is a metal element. Mass number of it is 24.
Copper is a metal element. Mass number of it is 64.