Oxygen-16 IS an isotope of oxygen. If you meant to ask the number of isotopes of oxygen, the answer is 3. They are Oxygen-16, -17 and -18.
Oxygen-16 is the most abundant of the isotopes.
10 isotopes 10 isotopes
Natural gallium has 2 stable isotopes
Californium has 20 isotopes and 1 isomer.
Not all isotopes are unstable. But now more than 3 000 unstable isotopes are known, artificial or natural.
Radium has today 33 isotopes and 12 nuclear isomers.
For the standard isotope Oxygen16 O = 16 but atomic number 8 therefore 16-8 = 8 - so 8 neutrons
Mendelevium has 15 isotopes.
Germanium has 9 isotopes.
No, there are many stable isotopes.
There are 37 isotopes of Hafnium.
it has 3 stable isotopes
Hydrogen has three isotopes
Seaborgium (Sg) has 17 isotopes - including isomers and metastable isotopes.
10 isotopes 10 isotopes
Now are known 118 chemical elements (natural or artificial) with more than 3 100 isotopes.
Californium has 20 isotopes and 1 isomer.
Bohrium has 16 isotopes and 1 isomer.