Fluorine-19 (not "flourine-19) has an atomic number of 9 and therefore has 9 each of protons and electrons. The number of neutrons is found by subtracting the atomic number from the Atomic Mass number: 19 - 9 = 10 neutrons.
4 electrons, 2 valence electrons
Germanium has 32 electrons.
Xenon has 54 electrons.
Argon has 18 electrons.
Roentgenium has 111 electrons.
8 electrons
16 electrons
20 electrons
6 electrons
97 electrons
4 electrons.
4 electrons, 2 valence electrons
Germanium has 32 electrons.
Xenon has 54 electrons.
Argon has 18 electrons.
15 total electrons, 3 valence electrons
Terbium has 65 electrons