Answer:
Rn
Explanation:
Rn is the symbol for radon with the atomic number of 86
The formula of this ion is CrO42– . The correct option among all the options that are given in the question is the third option or the last option. The other choices are incorrect and can be easily negated. I hope that this is the answer that you were looking for and the answer has come to your desired help.
Answer: The smallest bond angle in the molecule x-y-x is 
Explanation:
According to VSEPR theory , each atom in a molecule will achieve a geometry that minimizes the repulsion between electrons in the valence shell of that atom.
In the given compound 
, the number of electron pairs is 2 that means the hybridization will be 
and geometry of the molecule will be linear as there are two bond pairs .The bond angle for linear geometry is 180° which reduces the electron electron repulsions and maximise stability.
