Fluorine is a non metal element. Mass number of it is 19.
The number of protons in the atomic nucleus
The atomic number of chlorine is 17.
protons and neutrons
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In the exact center of the atom.
august 6 1945.
The value of the mass of a neutron is 1,6x10-27Kg or 0,0000000000000000000000000016Kg
Gold: Symbol - Au Number - 79 Mass - 196.96655 (As calculated by all of its known ions) Electron Configuration - [Xe] 6s2 5d9 Charge - 1+, 3+ Silver: Symbol - Ag Number - 47 Mass - 107.8682 (As calculated by all of its known ions) Electron Configuration - [Kr] 5s2 4d9 Charge - 1+
Chromium (Cr), which has an atmoic number of 24. Beryllium has an atomic number of 4, so 4*6=24, which is Chromium.
The mass number of Am-241 is 241; each isotope has another mass number.
Atomic mass is the number of protons in an atom mass number is the number of protons plus neutrons in an atom the number of neutrons would equal the mass number minus the atomic number.
The atomic weight of uranium is 238,02891(3) atomic mass units. The mass number is the total number of nucleons (protons an neutrons) in the nucleus; the mass number is different for each isotope: 234U: mass number 234 235U: mass number 235 238U: mass number 238