Oxygen-16 has 16 electrons (the 16 refers to the number of electrons, so Oxygen-15 if it exist, will have 15 valence electrons)
4 electrons, 2 valence electrons
Germanium has 32 electrons.
Xenon has 54 electrons.
Argon has 18 electrons.
Roentgenium has 111 electrons.
For the standard isotope Oxygen16 O = 16 but atomic number 8 therefore 16-8 = 8 - so 8 neutrons
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