What is the chemical formula for nickel (iii) oxide? nio ni3o nio3 ni2o3

Hello!

The chemical formula for Nickel (III) Oxide is Ni₂O₃

In chemical nomenclature, we read from left to right:

Then we combine the two ions as follows, multiplying each one by the charge of the other to neutralize the charges:

2Ni⁺³ + 3O⁻² → Ni₂O₃

So, the chemical formula is Ni₂O₃

Have a nice day!

Putting this here just because the answer seems to have some blurry/unreadable parts, I do not take credit for solving this question... The answer is Ni2O3

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.